'The Bachelorette' Finale: Chrystie Corns Reverses Opinion of J.P.

Ashley Hebert found love with J.P. Rosenbaum on the season finale of The Bachelorette Monday night, and she may also have unwittingly made her sister on the TV's most infamous faces. Chrystie Corns was cast as a villainess of sorts on the seventh season finale, telling her sister that Rosenbaum was not the man for her, "I don't see it. I think you're too spunky and he's just kind of a little bit older and a little bit more demure."

STORY: 'The Bachelorette' Finale: Chrystie Corns Under Fire

The frank talk didn't dissuade Hebert's final decision -- she and Rosenbaum are now engaged -- and Corns is now backing her future brother-in-law one hundred percent. Her tweets of the past 24 hours have been a mix of good wishes for the couple and some regrets about her behavior:

"My heart was in the right place..my mouth was not. Lesson learned!"
"I feel truly horrible about my behavior"
"She [ashley] has consistently made the right decisions for her life, I feel foolish for doubting her."
"Ultimately, she chose the right guy!"
"Nothing but the best for those two! Very excited to see them start their life together!"

STORY: 'Bachelorette' Ashley Hebert, Fiance Say No to TV Wedding for Now

Corns appeared on TLC's Extreme Couponing prior to appearing on The Bachelorette.

She runs a company and blog called "I Love to Gossip," which breaks down hot retail deals (today's pick: Revlon Lustrous Lipstick only $.29 at CVS!").