AR4 / WENN 1 / 6

Tamra Judge is finally going to get that fifth baby she's been wanting! "The Real Housewives of Orange County" star revealed on Sunday, July 13, she's going to be a grandmother; her eldest son, Ryan Vieth, and his fiancée Sarah Rodriguez are expecting their first child together.

PHOTOS: Before they were Real Housewives

"@bravoandy we've got something to talk about tomorrow night. Thank you Jesus #blessing," the reality star captioned a picture of Rodriguez's sonogram, giving a shout out to Andy Cohen, with whom she is set to film the RHOC reunion special on July 14. 

Ryan, 28, took to his own Instagram on July 12 to break the news, sharing a picture of his fiancée's baby bump, with the caption: "@sarahrod7777 #ohmartha what's going on in there."

PHOTOS: Housewives biggest moments

On the current season of "Real Housewives of Orange County," Tamra has been vocal herself about wanting a child at age 46 with third husband Eddie Judge. On the July 7 episode the couple decided a baby is not in their future after a hilarious trial run with a doll named Astro.

Before announcing the big news, Rodriguez instagrammed Ryan with Astro and the discreet caption: "What a natural!!! Hmmmmm @tac_lion."

PHOTOS: Real Housewives husbands

Tamra was equally as ecstatic when announcing her son was engaged back in April, captioning a pic of herself with Rodriguez and Ryan on April 12, "Ryan's getting married. He better shave!!!!!"

Tamra only just met Rodriguez in March. The reality star wrote on Instagram four months ago: "Headed to meet my son @fit_lion new girlfriend @sarahrod777 . Must be a Big deal...he never brings girls home to mama. Maybe I can talk her into convincing Ryan to shave?" 

This will be the first child for Ryan, whose dad is Tamra's ex-husband Darren Vieth.


Hollywood's baby boom

Who's the most stylish celeb baby?

Unusual baby names