"I said 'YES,'" she captioned a photo of herself cozying up next to Steve while putting her tear-drop diamond, rose-gold ring on display. She added the hashtags "#engaged #happy and #mylove."
The two are currently in Coto de Caza, but it's unclear if Bravo cameras were there to capture the proposal.
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Vicki and Steve have been dating for nearly three years, and she's been eager to tie the knot for quite some time.
When Vicki stopped by TooFab last July, Steve had just moved into her Orange County home.
"My life is very exciting going forward," she told us at the time. "If Steve and I decide to get married, we've got that whole new journey of blending our families. I don't know what God has in store for me; I just know that my story isn't over yet."
This will be Vicki's third marriage. She was married to Michael J. Wolfsmith from 1982 to 1991. The two share children Michael Wolfsmith and Briana Culberson. In 1994, she married Donn Gunvalson and founded Coto Insurance and Financial Services. They divorced in 2014.