Ashlee Simpson-Wentz Wants "A Big Family"

Ashlee Simpson-Wentz, who is loving life as mama to 1 ½-year-old Bronx, says she and rocker hubby Pete Wentz, 31, are excited about the idea of someday adding to their family of three.

“We would love to have a big family,” says the 25-year-old singer/actress. “(But) you can never plan something like that.”

The proud mama admits that her son is growing up fast, but that she’s enjoying every moment:

Every day is like a milestone, I swear. It is the best thing. I mean, being a mother, taking the time that I have taken off just to be with him has really been incredible. Every day he is learning something new and growing. It is fantastic. I feel very fortunate.

Ashlee and Pete celebrated their 2-year wedding anniversary on May 17.