Jax Taylor and Brittany Cartwright seem to be doing great, but now he is spreading a rumor about his girlfriend that isn't going to make her very happy. It turns out that tonight on the big "Vanderpump Rules" premiere, Jax will share that he walked in on his girlfriend having a lesbian hookup with someone else on the show. 

So who did Brittany Cartwright allegedly hookup with?

Now Brittany is working at SUR with everyone else. Of course, she was already around Jax's friends, but now she is there even more. Tonight Jax will speak out about Brittany and say that he walked in on her and that Kristen Doute was going down on her at the time.

Kristen has hooked up with pretty much everyone on the show, so that wouldn't be surprising, but it is hard for some people to believe that Brittany might do it. 

Jax says that he walked in on it and then talks about how if Brittany caught him doing something it would be okay if she told everyone, but now she is upset that he is talking. Brittany is actually denying what Jax Taylor has to say about her, though. She is seen saying, "I've kissed girls, like, drunk, but Kristen and I did not hook up, she did not go down on me. I cannot make this any more clear: I am strictly dickly."

Now Jax Taylor won't admit that he is lying, though. Maybe Brittany just didn't want this all on Television for the world to see or she is embarrassed that she really did it. Regardless, nobody knows the truth, and it is going to be interesting to see how it all goes down on the show tonight.

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Hopefully tonight Kristen Doute will share her side of the story on the show. 

Fans can't wait to see how it all goes down on "Vanderpump Rules" this season. It is going to be a wild ride that you do not want to miss that is for sure. 

Are you shocked by the rumors that Brittany Cartwright hooked up with Kristen Doute? Do you think that what Jax Taylor is sharing is true? Sound off in the comments section below on your thoughts, and don't miss new episodes of "Vanderpump Rules" on Monday nights on Bravo when they air.