Thinking about that makes me sad, actually. :( Like, I can see Andy/April working in so many different threesomes, but this one is the big exception. Even after everything else that has happened, I don't think April would be able to deal with Ann and Andy together. And on the other end, I don't think it would be a healthy thing for Ann at all - she's moved on from Andy so much, it would be kind of moving backwards for her. Plus I can't see them having an actual relationship, not just sex, and it would always be April/Andy + Ann, and I think Ann wouldn't be happy/satisfied being a third wheel rather than someone with all the attention.