I do see it from his side as well though, she will be a totally different person than who he first met.I'm under the perception that I think she mainly won't go for it is because of Matt, we don't know what's been said behind closed doors. But I wouldn't be surprised, I said it way early in the threads.
He's only with her because of the cancer, I don't think they'd still be together if she was a healthy girl.
I can't even imagine the impact of fertility and sex? Those are huge parts of a relationship which will never be normal again. Even now I wonder how that strains the relationship.