Jessica Simpson and Eric Johnson's family is growing! On Sept. 18, the mom of two announced on Instagram that she's officially expecting a little girl, and it looks like Maxwell and Ace are more than ready for another baby to dote on. The soon-to-be mom of three is over the moon about the news and captioned the photo: "This little baby girl will make us a family of five. We couldn't be happier to announce this precious blessing of life." Congrats to this supersweet family!