apologies how fucking dare you!
The OP had implied the man had form for watching whilst others get pissed and then taking advantage. I had asked to check that the female friend was ok just in case. I did NOT mention rape not once, I mentioned something that I thought would be sensible going off what the OP had said about the male in question.
I am NOT one of those people who go around thinking all men are rapists, in fact on many other threads I've been accused of exactly the opposite so it seems rather ironic that I'm now being told I've accused a man of raping someone.
How utterly ridiculous and how disgusting offensive. Thanks a bunch.
OP. I completely understand where you and your dh are coming from. However I do think that you need to take some responsibility - your dh for inviting someone he knew might be trouble and both of you for going to bed and leaving a couple of very pissed people downstairs, trusting that they would take themselves off home in that state. If you didn't trust the man then he shouldn't have been invited and I'm sorry but you do need to take some responsibility as you have discovered, not everyone has the same standards.
Re-decorating the room is a good idea and as this friend clearly takes advantage of peoples good nature and is stressing out your dh, it's probably best to end the friendship. I don't think getting them to re-decorate is a good idea for heaven's sake - that's pushing it too far. What they did was not a crime nor illegal, just disrespectful and you've no right to enforce any kind of punishment.
You said the female is going through a hard time so I still think she was taken advantage of in some way (NOT saying rape) but she was vulnerable and pissed and perhaps she now feels terrible, so do get in touch with her to make sure that she is ok.