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Two kids. That's probably enough for Jessica Simpson.

The mama to Maxwell, 2, and Ace, 18 months, opened up recently to InStyle Magazine, chatting about her sex life, her much-scrutinized weight and how pregnancy wore her body down.

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"Having two kids back-to-back was hard on my body," she says, telling the magazine she doesn't think she'll have another one. "But if I do have more, I wouldn't want them to read this and think they weren't wanted!"

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Of course, if she were to get pregnant again, it would just mean more public scrutiny about her body -- something she continues to deal with.

"I'd been scrutinized about my weight before I got pregnant, so I refused to let anyone steal the joy of my babies," she says. "My husband [Eric Johnson] and I were looking at old pictures recently, and I asked him, 'Babe, why didn't you tell me to put the brownie down?' He said, 'You looked great.' He's always loved every curve on my body. And we've always had a healthy sex life."

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These days Jessica feels like a healthy version of herself. She works out five days a week and takes care of herself, in general. But first, she has to take care of her two little ones.

"I just do everything after I put the kids to bed. It's the only way to keep crayons and fingerprints off my face."