Motherhood sure suits Jessica Simpson!

Three months after welcoming daughter Maxwell Drew, the singer proved that she's adapting just fine to her mommy duties, as she clutched a baby bottle while out to a sushi lunch with Maxwell and fiance Eric Johnson Wednesday.

PHOTOS: Jessica Simpson's curve-hugging looks

Clad in a colorful printed caftan and sky-high platform heels, Simpson, 32, sported minimal makeup for the lunch outing with her family.

As Simpson relishes first-time motherhood, she's also focused on shedding unwanted pregnancy pounds. Having inked a $4 million deal with Weight Watchers, Simpson has until the end of the month to lose 20-30 pounds of the estimated 70 she gained while carrying her daughter, born May 1.

PHOTOS: Jessica Simpson's body evolution

"Jessica has always had issues with junk food," an insider tells Us Weekly of Simpson, who revamped her diet to cut out alcohol and started training again with pro Harley Pasternak.

VIDEO: Harley's healthy eating tips

"[Weight Watchers] focuses on healthy habits for the long-term (and I can still indulge in my guilty pleasures every now and then, too)," the new mom explained via Facebook May 30. "I have actually gotten a group of friends together who are going to be doing it with me."

This article originally appeared on PIC: Jessica Simpson Covers Up in Colorful Caftan