Vienna Girardi Battles Ex Jake Pavelka in Bachelor Pad Challenge

Jake Pavelka and his Bachelor ex, Vienna Girardi, are still at odds, and they're willing to do anything it takes to keep the other from winning Bachelor Pad 2's $250,000 prize.

In a new clip from Monday's premiere, Pavelka, 33 (partnered with Jackie Gordon) battles his bikini clad ex, 25 (partnered with her current beau, Kasey Kahl) in a challenge that involves the Bachelor Pad duos hanging upside down until there's one pair left. Adding insult to injury: Pavelka and Girardi — who split in 2010 after breaking off their engagement — are the last two contestants standing in a race to the finish.

While fans will have to tune into Monday's premiere to see who wins the challenge, one thing is for certain: Girardi is none too pleased to be in the house with her ex and her current squeeze. And, as the preview clip shows, neither is Kahl, 27.

"Your head's out of the game," Kahl tells teammate Girardi. "And that sucks for me, because I'm having to do a double workload 'cause you're out there flirting with the guys."

Angry Kahl doesn't have her back, Girardi snaps and the couple has their first fight of the season.

"I'm just pissed off right now," she seethes. "The only reason why I'm doing [the show] is because my boyfriend has said he will protect me and he's not. My head's not in the game because you haven't been here for me."

"I have my ex fiance who I can't even be in the room with, and instead of you trying to make that easier for me, you're getting mad at me," she continues. "What I need is for you to be comforting, not be mean to me!"

Watch more of the couple's bitter fight and check out the full episode of Bachelor Pad 2 Monday at 8 p.m. (EST) on ABC.

By Allison Corneau for Us Weekly. For more Channel Surfing, click here.

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