Not off the top of my head. The problem is most spuffy writers are very, shall we say, sensitive to any post-relationship bad behavior on Spike's part. They tend to the romanticism of the relationship and not the hardship. Not that there aren't any but they seem to be few and far between. Once the happy couple really get together the third party love interest is a thing of the past or simply a misunderstanding or a false impression. Like, she
thinks he may be up to no good but it's just Drusilla's machinations, Spike wouldn't
really do that type of thing. I've read a few Harm/Mac JAG stories where there was actual cheating on his part involved and the story was about them trying to put their relationship back together again and they were very compelling stories. I think that would be a very interesting story in the spuffyverse too but it isn't very common. If I could write (and my other story was finished) that is something I'd actually enjoy writing.
I'll try to think of any but I'm not sure if I have any leads on them for you. Others may be more aware of actual cheating stories out there. Hope so.
