Jessica Simpson Debuts Baby Son Ace Knute Johnson [PHOTO]

Jessica Simpson debuted her son, Ace Knute Johnson on the latest cover of Us Weekly.

Simpson appears with her son, who was born in June, and her 15-month old daughter Maxwell. Their father is her fiancé, Eric Johnson. The unveiling of Ace is the first time that the public has seen Simpson's second child since his birth. Simpson said that she and Johnson were settling into their new family life.

"With two kids, we have our hands full, but every day is a new adventure," the 33-year-old singer said. "It's fun! I feel very at peace with being a mom."

Simpson said she gave birth to Ace via C-section. Although she is very happy and loves both of her children, she was in no rush to add to her brood. Her back to pregnancies took a toll on the Texas native. She also had to endure a torrent of bullying because she gained considerable weight.

"Pregnancy is a lot. It was hard to do two so close together," she said.  "I have this huge sense of accomplishment, and I feel in my heart that I'm done. But obviously, accidents do happen!"

The full article will also have Simpson discussing her upcoming wedding to the father of her children. The issue is on newsstands now.