Ashlee Simpson Rosshas babies on the brain!

Three days after big sisJessica Simpsonwelcomed her third child,Birdie Mae Johnson, Ashlee, 34, appeared on theDaily Popwith husbandEvan Ross, where she revealed that meeting her new niece made her want more kids.

Ashlee is currently a mom of two — she shares daughterJagger Snow, 3, with Evan, and sonBronx Mowgli, 10, with ex-husbandPete Wentz.

The “Pieces of Me” singer also noted during the interview that the newborn, mother, and family were doing well after Birdie’s delivery this week.

Jon Kopaloff/FilmMagic; Amy Sussman/Getty Images

Ashlee Simpson and Jessica Simpson split

Jessica, 38, and her husbandEric Johnsonwelcomed daughter Birdie Mae on Tuesday, March 19, her rep confirmed to PEOPLE exclusively.

“We are so happy and proud to announce the birth of our perfect daughter, Birdie Mae Johnson,” Jessicawrote on InstagramWednesday, sharing a black-and-white photo of her older daughter meeting the new addition.

Ashlee alsoshared the same photo, writing on Instagram, “My heart is so full!! Welcome to the world Birdie! ❤️”

Jessica and the former NFL player also share sonAce Knute, 5, and daughterMaxwell “Maxi” Drew, 6½.

Jessica Simpson/Instagram

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Though Birdie is only a few days old, she is sure to fit in with her siblings and cousins, as Ashlee and Jessica’s kids have previously proven to be a tight bunch.

The sisters brought their respective broods together for some quality family time in February 2016, and the photographic evidence couldn’t be more adorable.

Inone image, Jessica’s son Ace snuggled up to Ashlee’s daughter Jagger. The trendy tot plopped a sweet kiss on Jagger’s head, which Jessica captioned, “Ace and Jagger #COUSINS.”

The families celebrated New Year’s Eve together in 2016, where theysnapped a photo. “Such a fun New Years. Happy 2016! Great family vibes!!” Ashlee wrote.

And last May, the sisters had a girl’s day at Disneyland with their daughters. In one shot,shared on Jessica’s Instagram, the group smiled as they posed with Minnie Mouse.

“So “Minnie” great memories #Disneyland,” Jessica captioned the shot.

source: people.com