I'm not defending his behaviour, just saying no, it never happened in MY bed. If he wanted to be with her (the boring chick) I told him to gtfo and go to her house for that . It's not her I consider a problem since we never planned to get back together. As far as we knew, once he left me, it was over. He left me before he did anything with her.
We haven't been living together since last June.
It's the other ones I had an issue with.
We're pretty much just friends with benefits now anyway so at this point really it's not a stretch for me to just cut it :S