Jessica Simpson's son Ace adorably cradles his cousin Jagger

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Jessica and Ashlee Simpson's Kids Snuggle Up for Sweet Snap

It doesn't get much cuter than this pic.

Jessica Simpson shared a photo on Sunday of her 2-year-old son, Ace, cradling Ashlee Simpson's baby, Jagger. "Ace and Jagger #COUSINS," she captioned the sweet moment.

Ace and Jagger #COUSINS

A post shared by Jessica Simpson (@jessicasimpson) on

WATCH: Jessica Simpson's Husband Eric Johnson and Her Mom Get Uncomfortably Close in New Photo

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Jessica Simpson's son Ace adorably cradles his cousin Jagger
NEW YORK, NY - APRIL 19: Jessica Simpson is seen on April 19, 2017 in New York City. (Photo by NCP/Star Max/GC Images)
NEW YORK, NY - APRIL 19: Jessica Simpson and Eric Johnson are seen going to dinner in the East Village on April 19, 2017 in New York City. (Photo by Gotham/GC Images)
NEW YORK, NY - APRIL 19: Jessica Simpson and Eric Johnson are seen on April 19, 2017 in New York City. (Photo by NCP/Star Max/GC Images)
LOS ANGELES, CA - APRIL 18: Jessica Simpson is seen at LAX on April 18, 2017 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LOS ANGELES, CA - APRIL 18: Jessica Simpson is seen at LAX on April 18, 2017 in Los Angeles, California. (Photo by starzfly/Bauer-Griffin/GC Images)
LOS ANGELES, CA - APRIL 18: Actress Jessica Simpson is seen on April 18, 2017 in Los Angeles, California. (Photo by SMXRF/Star Max/GC Images)
NEW YORK, NY - OCTOBER 26: Jessica Simpson is seen at JFK on October 26, 2016 in New York City. (Photo by starzfly/Bauer-Griffin/GC Images)
NEW YORK, NY - OCTOBER 25: Jessica Simpson is seen on October 25, 2016 in New York City. (Photo by XPX/Star Max/GC Images)
NEW YORK, NY - OCTOBER 25: Jessica Simpson attends the 2016 FFANY Shoes On Sale Gala Fundraiser hosted by QVC at The Waldorf Astoria on October 25, 2016 in New York City. (Photo by Daniel Zuchnik/WireImage)
NEW YORK, NY - SEPTEMBER 21: Eric Johnson (L) and fashion designer Jessica Simpson leave their Noho hotel on September 21, 2016 in New York City. (Photo by Ray Tamarra/GC Images)
NEW YORK, NY - SEPTEMBER 21: Jessica Simpson and Eric Johnson are seen at La Guardia Airport on September 21, 2016 in New York City. (Photo by Raymond Hall/GC Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0324 -- Pictured: (l-r) Jessica Simpson during an interview with host Jimmy Fallon on September 8, 2015 -- (Photo by: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - SEPTEMBER 10: Jessica Simpson attends Jessica Simpson and Mike Gansmoe ring the New York Stock Exchange Opening Bell at New York Stock Exchange on September 10, 2015 in New York City. (Photo by Andrew Toth/Getty Images)
NEW YORK, NY - SEPTEMBER 10: Singer/fashion designer Jessica Simpson poses for photographs after ringing the New York Stock Exchange opening bell at the New York Stock Exchange on September 10, 2015 in New York City. (Photo by Brent N. Clarke/WireImage)
NEW YORK - SEPTEMBER 09: Jessica Simpson and Eric Johnson are seen out in Manhattan on September 09, 2015 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - SEPTEMBER 09: Jessica Simpson attends Jessica Simpson Collection Presentation Spring 2016 New York Fashion Week on September 9, 2015 in New York City. (Photo by Desiree Navarro/WireImage)
NEW YORK - SEPTEMBER 09: Jessica Simpson and Eric Johnson are seen out in Manhattan on September 09, 2015 in New York, New York. (Photo by Josiah Kamau/BuzzFoto via Getty Images)
NEW YORK, NY - SEPTEMBER 08: Jessica Simpson Visits 'The Tonight Show Starring Jimmy Fallon' at Rockefeller Center on September 8, 2015 in New York City. (Photo by Theo Wargo/NBC/Getty Images for 'The Tonight Show Starring Jimmy Fallon')
NEW YORK, NY - SEPTEMBER 09: Eric Johnson and Jessica Simpson attend Jessica Simpson Collection - Presentation - Spring 2016 New York Fashion Week at Tavern on the Green on September 9, 2015 in New York City. (Photo by Taylor Hill/FilmMagic)
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Shortly after the sweet pic was posted, she caught Ace getting into some mischief. "'Mom and Dad will never know' #WHENABEAUTIFULSONHIDES #ACEKNUTE," she said of her son hiding in a basket.

Jessica also got a lesson in how to pose for a selfie from her daughter Maxwell. "Be cool and kiss the camera mom," the 3-year-old told her mother.

"Be cool and kiss the camera mom" - Maxwell Drew

A post shared by Jessica Simpson (@jessicasimpson) on

MORE: Jessica Simpson's Son Ace Knute Turns 2, Celebrates With Harry Styles Hair

In September, Jessica spoke with ET about her new nephew and revealed that Ace isn't the only one in love with his cousin. "Jagger just came over to see me, Maxwell and Ace the other day and she's so tiny and so sweet!" she gushed. "And Maxwell is just obsessed! She has baby dolls, she wants to be a mom already. She's a care taker!"

"Mom and Dad will never know" #WHENABEAUTIFULSONHIDES #ACEKNUTE

A post shared by Jessica Simpson (@jessicasimpson) on



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