Is it awkward for a guy to think his wife/girlfriend's sister is prettier than his...

I was seeing a girl at uni for about two months when she decided to invite to meet her family . When we got there the last one I get to meet is her younger sister who it turned out I'd had a one night stand with some months earlier . That's what you call awkward.

SinlessOnslaught · M

He can think whatever he wants. It's how he acts that matters.

GohantheThird · M

I don't think it really matters. Looks don't win it over for me, and I certainly wouldn't start dating someone's sister if I was initially interested in her at first. Too incestuous for my taste.
Unless she cheats on him, he will stay with the girlfriend.