........ Gotta say.... Regardless of if it's a cultural thing or not. Doesn't matter if there's a need or importance for either a sexual or romantic compatibility in a relationship. Virginity and rivals, not really important for anything except for personal taste.
....
This story's plot is weird. Pure and simple, it's weird.
Tldr "You're mothers dying so to make you feel better let's have sex". Sure, it's paraphrasing and not accurate, but it sure looks like that. Looks like a guy who just wants convenient sex. You may think it looks different, you might think it looks like true love, I don't know. I think it looks a bit predatory and kinda reluctant.