Jessica Simpson took to the cover of Us Weekly to introduce baby Ace to the world! Simpson's second child is nearly 2 months old and appears on the magazine's cover with his 15-month-old sister, Maxwell, and the proud mama. "With two kids, we have our hands full, but every day is a new adventure," Simpson told Us. "I have this huge sense of accomplishment, and I feel in my heart that I'm done. But obviously, accidents do happen!"