Real Housewives of OC Star Vicki's Daughter is...Prego

US Weekly is reporting that Vicki Gunvalson's daughter Briana is pregnant.  "Briana is pregnant and just about four months along," one source tells Us. The father-to-be is Briana's husband, Ryan Culberson, a U.S. soldier who recently fought in Afghanistan. As revealed on recent episodes of the Bravo hit, 24-year-old Briana (a nurse) and Ryan eloped in Las Vegas in October of last year.  Just like the elopement, the pregnancy "was definitely a surprise to Vicki," the source says. "Briana is really happy, and now that Vicki knows, she's really excited too."