Rachel Robinson's Instagram

Rachel Robinson's Challenge Family Is Growing

See the special pregnancy announcement

Rachel Robinson is about to have a "party of five."

The Challenge champ -- who welcomed twin boys Jack and Jesse in October -- happily announced this past weekend that her wife Natalie Gee is pregnant. Babies are about to rule this household!

"It’s official we are having a girl," Rachel captioned the family photo above. "I would like to thank my wife for giving us the girl. I would like to thank our boys in advance for being the best big brothers & I would like to thank you for all your support. It takes a village. Gee-Robinson party of 5. #agirl #itsagirl #moms #twomoms #geerobinson."

Fittingly, several of Rachel's fellow Road Rules alums tweeted congratulatory messages.

Be sure to offer your well-wishes to Rachel and Natalie in the comments, and don't miss Final Reckoning this Tuesday at 9/8c.