Dream of girlfriend, mad

(My girlfriend 's best friend, Matt who lives in Boston, stayed over her house a few nights ago while en route back to his home state. I refuse to meet him because he is constantly trying to sleep with her.) Dream: Britt (my girlfriend ) is trying on a very revealing piece of lingerie, but more of a very slutty dress, and I catch her doing it and get excited. She then tells me that Matt had bought it for her and that she had agreed to play this game with him. The game is that he throws her out of her house with nothing and wearing nothing but the slutty dress while he and his "sex partner" search for hidden stuff in her house to learn more about Britt. I get very mad and storm out.