All hell broke loose in the Big Brother house on Sunday as one houseguest became a pariah.

'Big Brother 17' Houseguests Try To Figure Out Who Voted For James

Head of Household: Shelli Poole

Nominees: Jason Roy and John McGuire

Other houseguests: Audrey Middleton, Austin Matelson, Becky Burgess, Clay Honeycutt, Jackie Ibarra, James Huling, Liz/Julia Nolan, Meg Maley, Steve Moses and Vanessa Rousso

Vanessa's Paranoia Goes Into Overdrive on the 'Big Brother' Live Feeds

Vanessa won the Power of Veto on Saturday, and she will likely be using it on Jason. This was the talk of Sunday as Audrey became the target of the entire house. Vanessa and Shelli had many discussions saying that the former should take down Jason, with Shelli then nominating Audrey as a replacement.

Audrey caught wind of the plan to backdoor her and proceeded to blow up the Sixth Sense alliance of Vanessa, Austin, Liz, Shelli and Clay. She wound up telling James and Jackie, but neither of them seemed to believe her for some reason.

Word got back to Vanessa that Audrey was doing this, so she did damage control to James. The entire house had a meeting in the HOH room while Audrey was in the Diary Room, where they all talked trash and compared notes on her.

It is an almost certainty that Shelli will nominate Audrey and since she has no allies in the game, she will almost certainly be evicted on Thursday. However, Shelli has said that she doesn't want there to be a "mob mentality" this week where everyone just gangs up on Audrey. Meanwhile, Audrey talked of possibly quitting the game, with Vanessa, James and Meg all comforting her and talking her out of it.

Big Brother 17 returns for another episode Wednesday at 8 p.m. ET/PT on CBS. The episode will feature the Power of Veto competition and the Veto ceremony.