'Temptation Island' Sneak Peek: Kate Finally Confronts David Over Threesome!

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With the season finalé of "Temptation Island" approaching, it's finally time for the couples to face off with each other and explain themselves for their actions during the taping of the show. Of all the drama that has gone down over the season, there's probably no couple we've wanted to see come to the table more than David and Kate.

In a sneak peek of Thursday's episode, which is the first part of the bonfire finalé, Kate is seen taking David to task for his infidelity with the single women during his time on "Temptation Island."

"I had to come here every bonfire and see that the person I came here to fight for, that you weren't holding up your end of the bargain," Kate told David.

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She continued, "Every word that you said before coming here was complete and utter bulls--t. I need someone that their words are followed up by actions, I need and deserve that."

Kate did not mince words with David, who she basically considers her ex at this point.

"You weren't committed to our relationship, the things I had to watch that you did. I think that you selfishly and cowardly brought me here for your own games."

David was so shocked by what Kate said that he couldn't even look her in the eyes.

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The night in question happened during a party at the guys' villa when David and Samantha ended up naked in the shower together ... and were soon joined by Payton. The episode also revealed some nighttime surveillance footage of the three rolling around in bed.

David knew he screwed up big time, and after the episode aired on TV, he took to social media in the real world to try and clear up any misconceptions about what went down.

"I did not have sex with Peyton or Sam that night, he wrote in a long list of explanations. I did not do anything more with Peyton that night than kiss her. I did not kiss or hookup with Sam that night."

However, he did admit that he let Kate down with his actions, and he's the only one to blame.

"None of these statements condone what I did do that night - which is go against everything I told Kate I wanted to go to TI to do. Its really hard to see this play out months later and see the pain Kate went through. I take full responsibility and regret it all and hope you will get to see that in future episodes."

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The threesome by David was so emotionally jarring to Kate that she ended up tossing her cookies immediately after seeing the video surveillance during the bonfire. She felt betrayed and humiliated by David, and didn't think there was ever a way for her to forgive him.

David wasn't sure how bad he had hurt his girlfriend until he received her video message earlier in the season, where she made her stance very clear.

Kate said she thinks about David all the time, and she thanks him for bringing her to the island. She then says, "I have carried myself with nothing but dignity and respect from day one, and I really wish I could say the same for you."