Ace, 14 months, looked like something had caught his eye while he walked barefoot on the family's wooden floors. He held onto a snack with crumbs adorably left on his pouty lips.
Simpson, 34, has rarely posted snapshots of her son standing on his own two feet — a milestone she's sure to be treasuring. That same day, the fashion mogul said she and husband Eric Johnson probably won't be giving Ace and 2-year-old daughter Maxwell any more siblings.
"Oh, we are done," she said during an interview for On Air With Ryan Seacrest. "I say we're done. [But,] I don't want to accidentally get pregnant one day and then that poor kid feels like it wasn't meant to be or something. We've got the girl and we've got the boy."