Dream of girlfriend

I had a dream that the improvisation team i manage was having a meeting in our office. we were waiting for our other manager, who is also my lover, to arrive. for some reason, he could not make it, so he sent his ex- girlfriend (whom he lives with) in his place. Although i was cordial with her, she was bluntly rude to me and began calling me names life home-wrecker, slut, whore, and asking how i could sleep with her man. i told her that since they were no longer in a relationship it didn't matter and that i wasn't going to apologize. she replied saying that just because they are on a break doesn't mean they're broken up.