Ans she reveals how the new parents are doing!

Proud aunt Jessica Simpson is gushing with joy about her newborn nephew, Bronx Mowgli Wentz -- and she's dishing on how little sis' Ashlee and hubby Pete Wentz are doing since becoming first-time parents!

"Bronx is beyond precious. I'm over the moon with joy," Jessica tells People magazine. "Life is a beautiful miracle. Ashlee and Pete are healthy, happy, and enjoying every moment."

Ashlee and Pete welcomed their first bundle of joy Thursday night.