"He's great. He's [steadily] growing," Jennifer told Access Hollywood's Maria Menounos. "He's crawling now."
Jennifer said raising her beautiful 7-month-old, who is named after his daddy, the singer's fiance, David Otunga, is a complete joy.
"I'm just loving being a mom," the Chicagoan said.
Jennifer opened up about life at home and revealed her little one loves the family pets so much that he tries to speak doggy language.
"The baby loves them," Jennifer told Maria of David's affection for the family dogs. "He's always trying to play with them and he thinks he's one of them. He even growls like the dogs and I'm like, 'Are you growling?'
"We were just on the plane the other day and he was growling at the broccoli that he was playing with," Jennifer laughed. "He was like, 'Arrrrr!' He growls at the other babies and he think that's how you're supposed to communicate."
Besides caring for her son, Jennifer is getting ready for her wedding. And she told Maria her gown is all taken care of.
"That's been done," Jennifer said. "You'll have to wait and see it. It's fierce… It has its own show."
Jennifer revealed, like any bride, she has been working out ahead of her big day.
"I just walk, run, stay consistent and just stay in focus," she said. "It's all about health this year."