If Kristin Cavallari's baby daddy, Jay Cutler, told her when she was getting too fat ... that would be less sweet. But in our modern age, thin is usually in — especially for reality TV stars like KCav.

The Hills and Laguna Beach alum talked to Disfunkshion about life with the Chicago Bears quarterback and their son, Camden, age 8 months. "I'm lucky to have Jay who would rather have a couple pounds on me," Kristin said (via Us Weekly). "He tells me when I'm too skinny. That helps. I take care of myself, go to the gym, eat well. There are good and bad days."

The Dancing With the Stars Season 13 alum also said she's put her Cali career second to her Chi-Town son. "Being a mom has definitely changed my priorities. It's all about him. I've turned down jobs that would have kept me in L.A. because I want to be there for him." She's also there for her fiance, who has a milestone birthday coming up on April 29. Kristin tweeted about slow roasting a chicken, then shared a pic of cupcakes, writing, "I also made red velvet cupcakes with cream cheese frosting for sooomeone's bday next week. We're celebrating all week! 30 is a big one."

She's so domestic now! And since it's his b-day, and he likes her with a few extra pounds, she should keep a lot of those cupcakes for herself.

Sources: Us Weekly, @KristinCavallari