Caitlyn Jenner 'wasn't happy at first' about Kylie Jenner becoming a young mom, source says (Exclusive)

Not everyone in Kylie Jenner's family was thrilled to hear that she is pregnant.

A source close to the Kardashian-Jenner brood tells ET that Caitlyn Jenner "wasn't happy at first about Kylie becoming a young mother." The source adds that Caitlyn is also "hesitant" about her daughter's boyfriend, Travis Scott. 

As for Kylie, the source says she "wasn’t happy about how Caitlyn responded."

That being said, the 20-year-old reality star still maintains a relationship with the 68-year-old Olympian, who understands that her daughter is an adult and can make her own decisions.

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While Caitlyn may have been apprehensive about her daughter becoming a young mom, Kylie has said in the past that this is what she's always wanted. In a 2016 episode of Keeping Up With the Kardashians, Kylie asks Caitlyn, "What do you feel like is a good age to have kids?"

Answering her own question, Kylie says 25 while Caitlyn says 30.

"I feel like 30 is too late," the youngest Jenner sister touts. "Every psychic said I'm only gonna have two kids."

In a 2015 interview with Teen Vogue, when Kylie was just 17, she also shared that she wanted to be a young mom, noting that she hoped to have children before she was 27. 

"When I look to the far future and decide to have kids, I need to have a million girls," Kylie said. "Ten years from now -- in 2025 -- I hope I have a kid."

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Caitlyn Jenner out and about
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Caitlyn Jenner out and about
VIENNA, AUSTRIA - JUNE 01: Life Ball guest Caitlyn Jenner arrives on the Life Ball plane on June 1, 2018 in Vienna, Austria. The Life Ball, an annual charity event raising funds for HIV & AIDS projects, celebrates its 25th anniversary this year at Vienna's City Hall. (Photo by Christian Hofer/Getty Images)
SALZBURG, AUSTRIA - JUNE 01: Caitlyn Jenner poses during the arrival of the Life Ball plane on June 1, 2018 in Salzburg, Austria. The EpicRiders travel from Zurich to Vienna as part of the Life Ball 2018 raising money for amfAR's life-saving research to find a cure for HIV/AIDS. (Photo by Lennart Preiss/Getty Images)
VIENNA, AUSTRIA - JUNE 01: Life Ball guest Caitlyn Jenner arrives on the Life Ball plane on June 1, 2018 in Vienna, Austria. The Life Ball, an annual charity event raising funds for HIV & AIDS projects, celebrates its 25th anniversary this year at Vienna's City Hall. (Photo by Christian Hofer/Getty Images)
LOS ANGELES, CA - DECEMBER 11: Caitlyn Jenner is seen on December 11, 2017 in Los Angeles, California. (Photo by PG/Bauer-Griffin/GC Images)
LOS ANGELES, CA - DECEMBER 07: Caitlyn Jenner attends the 2017 GQ Men of the Year Party at Chateau Marmont on December 7, 2017 in Los Angeles, California. (Photo by Michael Kovac/Getty Images for GQ)
DUBLIN, IRELAND - NOVEMBER 10: Caitlyn Jenner appears on 'The Late Late Show' on November 10, 2017 in Dublin, Ireland. (Photo by Phillip Massey/GC Images)
LISBON, PORTUGAL - NOVEMBER 09: Caitlyn Jenner, Olympian and Advocate of Transgender Rights, speaks on 'Who defines gender?' during the final day of Web Summit in Altice Arena on November 09, 2017 in Lisbon, Portugal. Web Summit (originally Dublin Web Summit) is a technology conference held annually since 2009. The company was founded by Paddy Cosgrave, David Kelly and Daire Hickey. The topic of the conference is centered on internet technology and attendees range from Fortune 500 companies to smaller tech companies. This contains a mix of CEOs and founders of tech start ups together with a range of people from across the global technology industry, as well as related industries. This year's edition, starting on November 06, is the second to be held in Lisbon and will congregate almost 60,000 participants. (Photo by Horacio Villalobos - Corbis/Getty Images)
LOS ANGELES, CA - SEPTEMBER 02: Caitlyn Jenner is seen on September 2, 2017 in Los Angeles, California (Photo by SMXRF/Star Max/GC Images)
LOS ANGELES, CA - AUGUST 01: Television personality Caitlyn Jenner attends WORLDZ Cultural Marketing Summit at Hollywood and Highland on August 1, 2017 in Los Angeles, California. (Photo by Jerod Harris/Getty Images for PTTOW!)
JIMMY KIMMEL LIVE - 'Jimmy Kimmel Live' airs every weeknight at 11:35 p.m. EST and features a diverse lineup of guests that includes celebrities, athletes, musical acts, comedians and human-interest subjects, along with comedy bits and a house band. The guests for Tuesday, July 18 included Caitlyn Jenner (Book, 'Secrets of My Life'), Finn Wittrock ('Landline') and musical guest Brett Young. (Randy Holmes/ABC via Getty Images) CAITLYN JENNER
NEW YORK, NY - JULY 14: Caitlyn Jenner at The View on July 14, 2017 in New York City. (Photo by Jackson Lee/GC Images)
THE VIEW - Caitlyn Jenner guest co-hosts and Mischa Barton is the guest today, Friday, July 14, 2017 on ABC's 'The View.' 'The View' airs Monday-Friday (11:00 am-12:00 pm, ET) on the ABC Television Network. (Photo by Lorenzo Bevilaqua/ABC via Getty Images) CAITLYN JENNER
ST PAUL, MN - JULY 16: Caitlyn Jenner walks the red carpet at the 2017 Starkey Hearing Foundation So the World May Hear Awards Gala at the Saint Paul RiverCentre on July 16, 2017 in St. Paul, Minnesota. (Photo by Adam Bettcher/Getty Images for Starkey Hearing Foundation)
THE VIEW - Caitlyn Jenner guest co-hosts today, Thursday, July 13, 2017 on ABC's 'The View.' 'The View' airs Monday-Friday (11:00 am-12:00 pm, ET) on the ABC Television Network. (Photo by Heidi Gutman/ABC via Getty Images) CAITLYN JENNER
BEVERLY HILLS, CA - JUNE 18: Caitlyn Jenner displays her Austin-Healey Sprite and wins an award for 'most fashionable' car at The Rodeo Drive Concours d'Elegance on June 18, 2017 in Beverly Hills, California. (Photo by Tibrina Hobson/Getty Images)
LONDON, ENGLAND - MAY 12: Caitlyn Jenner attends the British LGBT Awards at The Grand Connaught Rooms on May 12, 2017 in London, England. (Photo by David M Benett/Dave Benett/Getty Images)
NEW YORK, NY - APRIL 26: Caitlyn Jenner arrives at The View studios on April 26, 2017 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES - MAY 8: Caitlyn Jenner and Michael Weatherly chat with James Corden during 'The Late Late Show with James Corden,' Monday, May 8, 2017 (12:35 PM-1:37 AM ET/PT) On The CBS Television Network. (Photo by Terence Patrick/CBS via Getty Images)
BEVERLY HILLS, CA - APRIL 01: TV personality Caitlyn Jenner (L) and Paris Jackson attend the 28th Annual GLAAD Media Awards in LA at The Beverly Hilton Hotel on April 1, 2017 in Beverly Hills, California. (Photo by Todd Williamson/Getty Images for GLAAD)
RANCHO MIRAGE, CA - MARCH 29: Caitlyn Jenner walks across the fairway of the 9th during the ANA Inspiration Pro-Am at Mission Hills Country Club on March 29, 2017 in Rancho Mirage, California. (Photo by Kelly Kline/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 26: Caitlyn Jenner attends the 2017 Vanity Fair Oscar Party Hosted by Graydon Carter at the Wallis Annenberg Center for the Performing Arts on February 26, 2017 in Beverly Hills, California. (Photo by C Flanigan/Getty Images)
WEST HOLLYWOOD, CA - FEBRUARY 26: Caitlyn Jenner and Andreja Pejic arrive at the 25th Annual Elton John AIDS Foundation's Oscar viewing party held at The City of West Hollywood Park on February 26, 2017 in West Hollywood, California. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - JANUARY 07: Olympic athletes Caitlyn Jenner and Simone Biles attend Life is Good at GOLD MEETS GOLDEN Event at Equinox on January 7, 2017 in Los Angeles, California. (Photo by Emma McIntyre/Getty Images)
MALIBU, CA - NOVEMBER 19: (L-R) Brandon Jenner, Caitlyn Jenner and Brody Jenner attend the Brandon Jenner Record Release Party For 'Burning Ground' on November 19, 2016 in Malibu, California. (Photo by Earl Gibson III/Getty Images)
LOS ANGELES, CA - NOVEMBER 14: TV personality Caitlyn Jenner attends Glamour Women Of The Year 2016 at NeueHouse Hollywood on November 14, 2016 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
THOUSAND OAKS, CA - OCTOBER 27: Caitlyn Jenner plays a tee shot during practice for the PGA TOUR Champions PowerShares QQQ Championship at Sherwood Country Club on October 27, 2016 in Thousand Oaks, California. (Photo by Ryan Young/PGA TOUR)
BEVERLY HILLS, CA - OCTOBER 24: Caitlyn Jenner attends the screening of Summit Entertainment's 'Hacksaw Ridge' at Samuel Goldwyn Theater on October 24, 2016 in Beverly Hills, California. (Photo by Tommaso Boddi/WireImage)
LOS ANGELES, CA - OCTOBER 22: Caitlyn Jenner attends the 15th Annual Queen USA Transgender Beauty Pageant at The Theatre at Ace Hotel on October 22, 2016 in Los Angeles, California. (Photo by Vincent Sandoval/WireImage)
LOS ANGELES, CA - AUGUST 19: Actress Candis Cayne and TV personality Caitlyn Jenner attend a cocktail reception Benefit for onePULSE Foundation at NeueHouse Hollywood on August 19, 2016 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
LOS ANGELES, CA - SEPTEMBER 14: Caitlyn Jenner is seen at LAX on September 14, 2016 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LOS ANGELES, CA - JULY 21: Caitlyn Jenner is seen on July 21, 2016 in Los Angeles, California. (Photo by BG010/Bauer-Griffin/GC Images)
Republican transgender rights activist Caitlyn Jenner participates in a Big Tent Brunch organized by the American Unity Fund in Cleveland, Ohio, during the Republican National Convention, on July 20, 2016. / AFP / Ivan Couronne (Photo credit should read IVAN COURONNE/AFP/Getty Images)
MALIBU, CA - JULY 03: Caitlyn Jenner seen out for grocery shopping on July 03, 2016 in Malibu, California. PHOTOGRAPH BY Barcroft Images London-T:+44 207 033 1031 E:hello@barcroftmedia.com - New York-T:+1 212 796 2458 E:hello@barcroftusa.com - New Delhi-T:+91 11 4053 2429 E:hello@barcroftindia.com www.barcroftimages.com (Photo credit should read Barcroft Images / Barcroft Media via Getty Images)
LOS ANGELES, CA - JUNE 10: Caitlyn Jenner (L) and singer Katy Perry attend the Moschino Spring/Summer 17 Menswear and Women's Resort Collection during MADE LA at L.A. Live Event Deck on June 10, 2016 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
LOS ANGELES, CA - JUNE 10: Caitlyn Jenner is wearing a dress from Moschino seen before the Moschino Fashion Show in the streets of Downtown Los Angeles on June 10, 2016 in Los Angeles, California. (Photo by Timur Emek/Getty Images)
NEW YORK, NY - MAY 14: (L-R) Diane Sawyer, Caitlyn Jenner, and David Sloan attend the 27th Annual GLAAD Media Awards at Waldorf Astoria Hotel in New York on May 14, 2016 in New York City. (Photo by Bryan Bedder/Getty Images for GLAAD)
NEW YORK, NY - JUNE 30: Caitlyn Jenner is seen on June 30, 2015 in New York City. (Photo by NCP/Star Max/GC Images)
NEW YORK, NY - JUNE 30: Caitlyn Jenner is seen coming out of Patricia Field store in New York City on June 30, 2015 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - JUNE 30: Caitlyn Jenner arrives at Patrica Field store in Soho on June 30, 2015 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - JUNE 29: Caitlyn Jenner is seen in Tribeca on June 29, 2015 in New York City. (Photo by Alo Ceballos/GC Images)
LOS ANGELES, CA - JULY 24: Caitlyn Jenner introduces Boy George and Culture Club at The Greek Theatre on July 24, 2015 in Los Angeles, California. (Photo by Tibrina Hobson/WireImage)
LOS ANGELES, CA - JULY 24: (EXCLUSIVE COVERAGE) Caitlyn Jenner attends Culture Club's performance at the Greek Theatre on July 24, 2015 in Los Angeles, California. (Photo by Kevin Winter/Getty Images for Nederlander)
LOS ANGELES, CA - SEPTEMBER 03: Caitlyn Jenner is seen on September 03, 2015 in Los Angeles, California. (Photo by gotpap/Bauer-Griffin/GC Images)
PACIFIC PALISADES, CA - SEPTEMBER 12: Caitlyn Jenner attends the 8th Annual Safety Harbor Kids Polo Classic Fundraiser at Will Rogers State Historic Park on September 12, 2015 in Pacific Palisades, California. (Photo by Michael Bezjian/Getty Images)
LOS ANGELES, CA - OCTOBER 03: TV personality and activist Caitlyn Jenner speaks onstage during the Point Foundation's Annual Voices On Point Gala at the Hyatt Regency Century Plaza on October 3, 2015 in Los Angeles, California. (Photo by Jason Kempin/Getty Images for The Point Foundation)
LOS ANGELES, CA - OCTOBER 27: Caitlyn Jenner attends Logo TV's 'Beautiful As I Want To Be' Web Series Launch Party at The Standard Hotel on October 27, 2015 in Los Angeles, California. (Photo by Gabriel Olsen/FilmMagic)
LOS ANGELES, CA - OCTOBER 27: (L-R) Chandi Moore, Candis Cayne, Caitlyn Jenner and Geena Rocero attend Logo TV's 'Beautiful As I Want To Be' Web Series Launch Party at The Standard Hotel on October 27, 2015 in Los Angeles, California. (Photo by Gabriel Olsen/FilmMagic)
LOS ANGELES, CA - OCTOBER 27: Caitlyn Jenner attends Logo TV's 'Beautiful As I Want To Be' web series launch party at The Standard Hotel on October 27, 2015 in Los Angeles, California. (Photo by Tibrina Hobson/Getty Images)
NEW YORK, NY - NOVEMBER 08: Caitlyn Jenner seen leaving 'Therese Raquin' on Broadway in Midtown on November 8, 2015 in New York City. (Photo by Robert Kamau/GC Images)
NEW YORK - NOVEMBER 08: Caitlyn Jenner seen at the Soho House for dinner on November 08, 2015 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - NOVEMBER 09: Olympic gold medalist Caitlyn Jenner attends Glamour's 25th Anniversary Women Of The Year Awards at Carnegie Hall on November 9, 2015 in New York City. (Photo by Taylor Hill/Getty Images)
Caitlyn Jenner speaks to the Chicago House luncheon at the Hilton Chicago on Thursday, Nov. 12, 2015. (Nancy Stone/Chicago Tribune/TNS via Getty Images)
LOS ANGELES, CA - JANUARY 04: Caitlyn Jenner Hosts Special Screening Of 'Tangerine' at Landmark Nuart Theatre on January 4, 2016 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
PASADENA, CA - JANUARY 14: Tv personality Candis Cayne (L) and executive producer/tv personality Caitlyn Jenner speak onstage during the 'I Am Cait' panel discussion at the NBCUniversal portion of the 2016 Winter TCA Tour at Langham Hotel on January 14, 2016 in Pasadena, California. (Photo by Frederick M. Brown/Getty Images)
RANCHO PALOS VERDES, CA - FEBRUARY 02: Executive Producer Caitlyn Jenner speaks at the AOL 2016 MAKERS conference at Terranea Resort on February 2, 2016 in Rancho Palos Verdes, California. (Photo by Alberto E. Rodriguez/Getty Images)
NEW YORK, NY - FEBRUARY 09: Caitlyn Jenner is seen on the streets of Manhattan on February 9, 2016 in New York City. (Photo by Michael Stewart/GC Images)
NEW YORK, NY - FEBRUARY 10: Caitlyn Jenner is seen on February 10, 2016 in New York City. (Photo by Ignat/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - FEBRUARY 14: Chris Rock, A. J. Calloway and Caitlyn Jenner attend the 2016 Pre-GRAMMY Gala and Salute to Industry Icons honoring Irving Azoff at The Beverly Hilton Hotel on February 14, 2016 in Beverly Hills, California. (Photo by Kevin Mazur/WireImage)
LOS ANGELES, CA - JULY 13: TV personality Caitlyn Jenner attends the 2016 ESPYS at Microsoft Theater on July 13, 2016 in Los Angeles, California. (Photo by Kevin Mazur/Getty Images)
BEVERLY HILLS, CA - FEBRUARY 28: TV personality Caitlyn Jenner arrives at the 2016 Vanity Fair Oscar Party Hosted By Graydon Carter at Wallis Annenberg Center for the Performing Arts on February 28, 2016 in Beverly Hills, California. (Photo by John Shearer/Getty Images)
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