Jessica Simpson baby

Jessica Simpson is sharing new photos of her adorable daughter Maxwell -- and opening up about motherhood!

The 32-year-old singer posted two new pics of her 4-month-old baby on Twitter yesterday, her fiance Eric Johnson's 33rd birthday."Last year at Daddy's party, Maxwell was in my belly. This year she's in my arms," Simpson tweeted along with the super cute shots.

Jessica was also Guest Editor at iVillage this week, where she blogged about being a mom and her "sexy" fiance.

"Watching him as a dad is probably one of the sexiest things I have ever seen," Jessica says. "There is something about having these big hands on this little baby that is, by far, one of the sexiest things in the world."

Check out the gallery above to see some more shots of Maxwell she shared with iVillage, plus a couple more she's already posted on Twitter.