Scott Disick asks Kourtney Kardashian if they'll get married in their 40s

These two just can't quit each other.

On Sunday's episode of Keeping Up With the Kardashians, Scott Disick seemed to be propositioning Kourtney Kardashian, his ex-girlfriend and the mother of his three children.

"When do you think we're going to get married, by the way -- like 40?" he quipped.

Kourtney wasn't having it.

WATCH: Khloe Kardashian Calls Kourtney and Scott Disick 'F**king Sick' After Trying to Hash Out Their Drama

"You think when I turn 40, I’m gonna go, 'Hey, I’ve been looking for this drunk guy and he has a bunch of dirty s**t- stained underwear?'" she joked.

Talks of marriage were spurred after the exes got in an argument after Kourtney uninvited Scott to sister Khloe Kardashian's birthday party. Offering up a weak reason, the oldest Kardashian sister said, "I didn’t want you to coming to the birthday and be photographed going in."

After getting some advice from Khloe, Kourtney decided to divulge the real reason she didn't want Scott at the party in a later conversation. "There’s times when I want you to come and there’s times that I don’t," she admitted. 

Scott also confessed that his trysts with a series of women while in Cannes, France, just prior to the soiree didn't look great. "Obviously I’m not able to handle everything that well,” he confided to Kourtney. “I don’t have the best support team. I can try to f**king be a better person, but it’s not the simplest thing."

38 PHOTOS
Kourtney and Scott through the years
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Kourtney and Scott through the years
LAS VEGAS, NV - MAY 23: Television personalities Scott Disick (L) and Kourtney Kardashian attend Scott's birthday celebration at 1 OAK Nightclub at The Mirage Hotel & Casino on May 23, 2015 in Las Vegas, Nevada. (Photo by Steven Lawton/FilmMagic)
(EXCLUSIVE, Premium Rates Apply) CALABASAS, CA - JANUARY 25: Kourtney Kardashian and Scott Disick at the Kardashians Website Launch For Their Store Dash at Dash in Calabasas, California. * EXCLUSIVE * (Photo by Todd Williamson/WireImage)
Kourtney Kardashian and Scott Disick arrive on the Red Carpet at the Premiere of Columbia Pictures' 'Step Brothers' at the Mann Village Theater on July 14, 2008 in Los Angeles, California. (Photo by Todd Williamson/WireImage)
LOS ANGELES, CA - SEPTEMBER 25: TV personalities Kourtney Kardashian and Scott Disick attend 'Rock The Vote' Hosted by Christina Aguilera held at the Esquire House Hollywood Hills on September 25, 2008 in Los Angeles, California. (Photo by Stefanie Keenan/WireImage)
LOS ANGELES, CA - AUGUST 20: Scott Disick and Kourtney Kardashian pose during a photo shoot on August 20, 2009 in Los Angeles, California. (Photo by Frazer Harrison/KK/WireImage)
WEEST HOLLYWOOD, CA - SEPTEMBER 22: Television personality Kourtney Kardashian and fiance Scott Disick sighting on September 22, 2009 in West Hollywood, California. (Photo by Chris Wolf/FilmMagic)
COSTA MESA, CA - DECEMBER 03: Scott Disick and Kourtney Kardashian at The An Family's Celebration of The Grand Opening Of their Gourmet Bistro AnQi located in The South Coast Plaza on December 3, 2009 in Costa Mesa, California. (Photo by Alexandra Wyman/WireImage)
Kourtney Kardashian and Scott Disick leave Il Pastaio on December 10, 2009 in Los Angeles, California. (Photo by BuzzFoto/FilmMagic)
LAS VEGAS - FEBRUARY 19: Scott Disick and Kourtney Kardashian attend Jet Nightclub at The Mirage on February 19, 2010 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
WELLINGTON, FL - MARCH 14: Kourtney Kardashian and Scott Disick are sighted at Palm Beach International Polo Club on March 14, 2010 in Wellington, Florida. (Photo by Larry Marano/WireImage)
BEVERLY HILLS, CA - SEPTEMBER 2: Kourtney Kardashian and Scott Disick arrive at The Taste of Beverly Hills on September 2, 2010 in Beverly Hills, California. (Photo by Gregg DeGuire/FilmMagic)
NEW YORK - SEPTEMBER 11: (L-R) TV personalities Kimberly Kardashian, Kourtney Kardashian and Scott Disick attend the Jill Stuart Spring 2011 fashion show during Mercedes-Benz Fashion Week at David Koch Theatre at Lincoln Center on September 11, 2010 in New York City. (Photo by Charles Eshelman/FilmMagic)
NEW YORK CITY - OCTOBER 21: (L-R) Scott Disick and Kourtney Kardashian sighting at Meatpacking District on October 21, 2010 in New York City. (Photo by Christopher Peterson/BuzzFoto/FilmMagic)
TV personalityies Scott Disick and Kourtney Kardashian attend the RLife LIVE launch at R Lounge at the Renaissance New York Times Square Hotel on October 29, 2010 in New York, City. (Photo by Charles Eshelman/FilmMagic)
NEW YORK CITY - MAY 13: (L-R) Scott Disick and Kourtney Kardashian sighting at Upper East Side on May 13, 2011 in New York City. (Photo by Christopher Peterson/BuzzFoto/FilmMagic)
(L-R) Television personalities Scott Disick and Kourtney Kardashian arrive to celebrate Kourtney's birthday at Gallery Nightclub at Planet Hollywood on April 15, 2011 in Las Vegas, Nevada. (Photo by Steven Lawton/FilmMagic)
LAS VEGAS, NV - MAY 27: Scott Disick and Kourtney Kardashian dine at Sugar Factory at Paris Las Vegas on May 27, 2011 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
Scott Disick and Kourtney Kardashian arrives at Chateau nightclub at Paris Las Vegas on May 27, 2011 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
TV personalities Kourtney Kardashian and Scott Disick attends Chateau Nightclub & Gardens on July 2, 2011 in Las Vegas, Nevada.
LAS VEGAS, NV - DECEMBER 31: (EXCLUSIVE COVERAGE) Television personalities Scott Disick (L) and Kourtney Kardashian celebrate New Year's Eve at the Sugar Factory at the Paris Las Vegas on December 31, 2011 in Las Vegas, Nevada. (Photo by David Becker/WireImage)
NEW YORK, NY - APRIL 23: Kourtney Kardashian and Scott Disick attend the grand opening of RYU on April 23, 2012 in New York City. (Photo by Jim Spellman/WireImage)
MIAMI, FL - SEPTEMBER 25: Kourtney Kardashian and Scott Disick are sighted on September 25, 2012 in Miami, Florida. (Photo by Uri Schanker/WireImage)
MIAMI BEACH, FL - OCTOBER 31: Scott Disick and Kourtney Kardashian arrive at Kim Kardashian's Halloween party at LIV nightclub at Fontainebleau Miami on October 31, 2012 in Miami Beach, Florida. (Photo by John Parra/WireImage)
NEW YORK, NY - APRIL 22: Scott Disick, and Kourtney Kardashian are seen in Soho on April 22, 2013 in New York City. (Photo by Alo Ceballos/FilmMagic)
LAS VEGAS, NV - MAY 26: Television personalies Scott Disick (L) and Kourtney Kardashian arrive at Scott's 30th birthday bash at Hyde Bellagio at the Bellagio on May 26, 2013 in Las Vegas, Nevada. (Photo by Steven Lawton/FilmMagic)
MIAMI BEACH, FL - JULY 21: TV personalities Scott Disick and Kourtney Kardashian attend the Wildfox Swim Cruise 2014 show at Soho Beach House on July 21, 2013 in Miami Beach, Florida. (Photo by John Parra/Getty Images for Wildfox)
MIAMI BEACH, FL - SEPTEMBER 27: Scott Disick and Kourtney Kardashian attend a cocktail reception to celebrate the launch of new watch for Audemars Piguet on September 27, 2013 in Miami Beach, Florida. (Photo by Alexander Tamargo/Getty Images)
NEW YORK, NY - NOVEMBER 05: Scott Disick and Kourtney Kardashian seen outside the DASH store on November 5, 2013 in New York City. (Photo by Raymond Hall/FilmMagic)
NEW YORK, NY - NOVEMBER 06: Kourtney Kardashian and Scott Disick are seen in Soho on November 6, 2013 in New York City. (Photo by Raymond Hall/FilmMagic)
NEW YORK, NY - MAY 31: (L-R) Television personalities Kourtney Kardashian and Scott Disick are seen on May 31, 2014 in New York City. (Photo by NCP/Star Max/GC Images)
LOS ANGELES, CA - MARCH 28: Television personalities Kourtney Kardashian and Scott Disick pose circa March 2014 in Miami Florida. (Photo by Jason Binn/WireImage)
PARIS, FRANCE - MAY 23: Kourtney Kardashian and Scott Disick leaving the Four Seasons George V Hotel on May 23, 2014 in Paris, France. (Photo by Neil P. Mockford/GC Images)
NEW YORK, NY - JUNE 12: Kourtney Kardashian and Scott Disick are seen in Sag Harbor on June 12, 2014 in New York City. (Photo by David Krieger/Bauer-Griffin/GC Images)
BRIDGEHAMPTON, NY - AUGUST 09: TV Personality Kourtney Kardashian and husband Scott Disick attend Women's Health Hosts Hamptons 'Party Under The Stars' for RUN10 FEED10 at Bridgehampton Tennis and Surf Club on August 9, 2014 in Bridgehampton, New York. (Photo by Paul Zimmerman/Getty Images for Women's Health)
LOS ANGELES, CA - SEPTEMBER 26: Kourtney Kardashian and Scott Disick are seen on September 26, 2014 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
LOS ANGELES, CA - OCTOBER 16: Scott Disick and Kourtney Kardashian are seen on October 16, 2014 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
LAS VEGAS, NV - APRIL 18: Scott Disick and Kourtney Kardashian celebrate Kourtney Kardashian's birthday at 1 OAK Nightclub at The Mirage Hotel & Casino on April 18, 2015 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
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WATCH: Scott Disick Says He Still Hits on Kourtney Kardashian 'About Once a Week,' But Will They Ever Reconcile?

The two have since moved on with models. Kourtney, 38, is currently dating Younes Bendjima, while Scott, 34, is seeing Sofia Richie, 19.

Over the summer, a source told ET that Scott was having a hard time with his ex's new romance. 

"It’s never an easy thing to watch someone you share three children with, and so many memories, move on with someone else," the source said, adding that Scott really doesn't know Younes. "Scott has had a hard time watching Kourtney move on while he is in the same place he’s been in for years. It’s been tough for him.”

54 PHOTOS
Kourtney Kardashian Style Evolution
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Kourtney Kardashian Style Evolution
Kourtney Kardashian, daughter of Bruce Jenner (Photo by Michael Caulfield/WireImage)
LOS ANGELES, CA - JULY 16: Kourtney Kardashian attends The 2008 ESPY Awards Arrivals at Shrine Auditorium on July 16, 2008 in Los Angeles, CA. (Photo by ANDREAS BRANCH/Patrick McMullan via Getty Images)
LOS ANGELES - OCTOBER 09: Kourtney Kardashian at the 'Keeping Up With The Kardashians' premiere party on October 9, 2007 in West Hollywood, California. (Photo by Jeff Vespa/WireImage)
Kourtney Kardashian at Kim Kardashian's 27th Birthday Party on October 21, 2007 at Les Deux in Hollywood, California.
TAMPA, FL - JANUARY 30: TV personality Kourtney Kardashian attends the 6th Annual Leather and Laces Celebration at Jackson's on January 30, 2009 in Tampa, Florida (Photo by Kevin Mazur/WireImage)
MIAMI BEACH, FL - FEBRUARY 27: Kourtney Kardashian arrives at LIV Nightclub on February 27, 2009 in Miami Beach, Florida (Photo by Gustavo Caballero/Getty Images)
NEILL J. SCHUTZER/�2009 RAMEY PHOTO LOS ANGELES, 7/28/09 KOURTNEY KARDASHIAN WEARING A SEE THROUGH DRESS. NJSGB (Photo by Philip Ramey/Corbis via Getty Images)
�2009 RAMEY PHOTO Los Angeles, Oct. 15, 2009 KHLOE and KOURTNEY KARDASHIAN go shopping for baby articles at Bel Bambini in West Hollywood, and of course, take along a camera crew to film them for their reality show. PGpg68 (Photo by Philip Ramey/Corbis via Getty Images)
�2010 RAMEY PHOTO Beverly Hills, California, June 22, 2010 A sexy looking KOURTNEY KARDASHIAN and boyfriend SCOTT DISICK were spotted shopping around Beverly Hills, CA. PGpg68 (Photo by Philip Ramey/Corbis via Getty Images)
BEVERLY HILLS, CA - SEPTEMBER 02: Television personality Kourtney Kardashian attends The Taste of Beverly Hills wine & food festival opening night on September 2, 2010 in Beverly Hills, California. (Photo by David Livingston/Getty Images)
Kourtney Kardashian attends Los Angeles Magazine's fall fashion issue party at The London Hotel on August 25, 2010 in West Hollywood, California.
NEW YORK - OCTOBER 05: Television personality Kourtney Kardashian enters her Tribeca hotel on October 5, 2010 in New York City. (Photo by Ray Tamarra/Getty Images)
NEW YORK CITY - OCTOBER 29: Kourtney Kardashian sighting at DASH store in Soho on October 29, 2010 in New York City. (Photo by Christopher Peterson/BuzzFoto/FilmMagic)
TV personalities Kim Kardashian (L) and Kourtney Kardashian are seen on the streets of Manhattan on November 5, 2010 in New York City.
�2010 RAMEY PHOTO Los Angeles, Nov 30 2010 KIM, KOURTNEY, KHLOE KARDASHIAN and baby Mason Disik were swarmed by paps and fans while arriving at LAX coming from New York. PGpg68 (Photo by Philip Ramey/Corbis via Getty Images)
LOS ANGELES, CA - DECEMBER 08: Kourtney Kardashian arrives at an in-store appearance celebrating the 'Kardashian by bebe' holiday and resort collections at the bebe Beverly Center on December 8, 2010 in Los Angeles, California. (Photo by Michael Buckner/Getty Images)
LOS ANGELES, CA - JANUARY 05: Kourtney Kardashian arrives at the 2011 People's Choice Awards at Nokia Theatre L.A. Live on January 5, 2011 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
WEST HOLLYWOOD, CA - APRIL 11: Kourtney Kardashian poses for a picture as Redbook celebrates first ever family issue with the Kardashians held at The Sunset Tower Hotel on April 11, 2011 in West Hollywood, California. (Photo by Toby Canham/Getty Images)
HOLLYWOOD, CA - AUGUST 17: Kourtney Kardashian attends the Kardashian Kollection Launch Party at The Colony on August 17, 2011 in Hollywood, California. (Photo by John Shearer/WireImage)
NEW YORK, NY - NOVEMBER 16: Khloe Kardashian and Kourtney Kardashian promote 'Dollhouse' at the Barnes & Noble, 5th Avenue on November 16, 2011 in New York City. (Photo by Slaven Vlasic/Getty Images)
LOS ANGELES, CA - DECEMBER 20: Kourtney Kardashian is seen shopping in Beverly Hills on December 20, 2011 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
NEW YORK, NY - SEPTEMBER 13: Kourtney Kardashian sighting on September 13, 2012 in New York City. (Photo by Jackson Lee/Star Max/FilmMagic)
NEW YORK, NY - FEBRUARY 17: Kourtney Kardashian is seen in Soho on February 17, 2014 in New York City. (Photo by Raymond Hall/GC Images)
LAS VEGAS, NV - APRIL 12: Kourtney Kardashian makes a special appearance at Kardashian Khaos at The Mirage Hotel and Casino on April 12, 2014 in Las Vegas, Nevada. (Photo by Denise Truscello/WireImage)
NEW YORK, NY - JUNE 26: Kourtney Kardashian is seen in Soho on June 26, 2014 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES, CA - AUGUST 30: TV personality Kourtney Kardashian attends the 2015 MTV Video Music Awards at Microsoft Theater on August 30, 2015 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
NEW YORK, NY - SEPTEMBER 14: Television personality Kourtney Kardashian leaves her Soho hotel on September 14, 2015 in New York City. (Photo by Ray Tamarra/GC Images)
LOS ANGELES, CA - JUNE 09: Kourtney Kardashian is seen in West Hollywood, Ca on June 09, 2015 in Los Angeles, California. (Photo by Light Brigade/Bauer-Griffin/GC Images)
NEW YORK, NY - SEPTEMBER 15: Television personality Kourtney Kardashian leaves her Soho hotel on September 15, 2015 in New York City. (Photo by Ray Tamarra/GC Images)
LOS ANGELES, CA - OCTOBER 21: Kourtney Kardashian is seen on October 21, 2015 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
CULVER CITY, CA - NOVEMBER 14: TV personality Kourtney Kardashian attends the 2015 Baby2Baby Gala at 3LABS on November 14, 2015 in Culver City, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
CULVER CITY, CA - NOVEMBER 19: TV personality Kourtney Kardashian attends the WWD And Variety inaugural stylemakers' event at Smashbox Studios on November 19, 2015 in Culver City, California. (Photo by Steve Granitz/WireImage)
BEVERLY HILLS, CA - JANUARY 10: TV personality Kourtney Kardashian attends InStyle and Warner Bros. 73rd Annual Golden Globe Awards Post-Party at The Beverly Hilton Hotel on January 10, 2016 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
LOS ANGELES, CA - NOVEMBER 27: Kourtney Kardashian is seen on November 27, 2015 in Los Angeles, California. (Photo by Bauer-Griffin/GC Images)
NEW YORK, NY - FEBRUARY 10: Kourtney Kardashian is seen walking in Soho on February 10, 2016 in New York City. (Photo by Raymond Hall/GC Images)
BEVERLY HILLS, CA - JANUARY 10: TV personality Kourtney Kardashian attends InStyle and Warner Bros. 73rd Annual Golden Globe Awards Post-Party at The Beverly Hilton Hotel on January 10, 2016 in Beverly Hills, California. (Photo by Frazer Harrison/Getty Images)
NEW YORK, NY - FEBRUARY 11: Khloe Kardashian, Kris Jenner, Kendall Jenner, Kourtney Kardashian, Kim Kardashian West, North West, Caitlyn Jenner and Kylie Jenner attend Kanye West Yeezy Season 3 at Madison Square Garden on February 11, 2016 in New York City. (Photo by Kevin Mazur/Getty Images for Yeezy Season 3)
LOS ANGELES, CA - APRIL 13: Kourtney Kardashian is seen at LAX on April 13, 2016 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
NEW YORK, NY - MAY 16: Kourtney Kardashian attend the NBCUniversal 2016 Upfront Presentation on May 16, 2016 in New York City. (Photo by Brad Barket/Getty Images)
LOS ANGELES, CA - JUNE 27: Kourtney Kardashian is seen on June 27, 2016 in Los Angeles, California. (Photo by BG003/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JUNE 24: Kourtney Kardashian is seen on June 24, 2016 in Los Angeles, California. (Photo by BG001/Bauer-Griffin/GC Images)
MIAMI, FL - JULY 04: Kourtney Kardashian is seen on the beach on July 4, 2016 in Miami, Florida. (Photo by John Parra/GC Images)
LOS ANGELES, CA - SEPTEMBER 28: Kourtney Kardashian is seen at LAX on September 28, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LOS ANGELES, CA - FEBRUARY 11: Kourtney Kardashian arrives at the Pre-GRAMMY Gala and Salute to Industry Icons Honoring Debra Lee on February 11, 2017 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
HOLLYWOOD, CA - APRIL 12: TV personality Kourtney Kardashian attends premiere of Open Roads Films' 'The Promise' at TCL Chinese Theatre on April 12, 2017 in Hollywood, California. (Photo by Barry King/Getty Images)
LOS ANGELES, CA - MAY 26: Kourtney Kardashian is seen at LAX on May 26, 2017 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
CANNES, FRANCE - MAY 23: Kendall Jenner and Kourtney Kardashian are spotted during the 70th annual Cannes Film Festival at on May 23, 2017 in Cannes, France. (Photo by J. Almasi/GC Images)
LOS ANGELES, CA - JULY 07: Kourtney Kardashian is seen at LAX on July 07, 2017 in Los Angeles, California. (Photo by LAXPICS/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JULY 26: Kourtney Kardashian is seen on July 26, 2017 in Los Angeles, California. (Photo by Hollywood To You/Star Max/GC Images)
LOS ANGELES, CA - JUNE 16: Kourtney Kardashian is seen on June 16, 2017 in Los Angeles, California. (Photo by BG002/Bauer-Griffin/GC Images)
PARIS, FRANCE - SEPTEMBER 30: Kourtney Kardashian attends the Haider Ackermann show as part of the Paris Fashion Week Womenswear Spring/Summer 2018 on September 30, 2017 in Paris, France. (Photo by Antonio de Moraes Barros Filho/WireImage)
PARIS, FRANCE - SEPTEMBER 30: Corey Gamble and Kourtney Kardashian are seen on September 30, 2016 in Paris, France. (Photo by Marc Piasecki/GC Images)
LOS ANGELES, CA - OCTOBER 25: Kourtney Kardashian attends the launch of PrettyLittleThing by Kourtney Kardashian on October 25, 2017 in Los Angeles, California. (Photo by Rich Fury/Getty Images)
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