Actually, if this were to happen to me, I wouldn't think it's funny at all. More so if my wife/gf were to actually leave me because of this. Some people can be so obsessed with their hobbies that they don't realise that they're putting a strain on their relationship. What's a relationship without the quality time with each other?
The fact that TS's friend's gf/wife had to do something so drastic is a sign that there's a problem already.
Some things are funny, but some other things, you'd have to think about it.