I mean there are countless stories of Gods marrying humans and wasn't Veldenava's wife a human woman? So that could have been their thoughts on the subject.
Fr they both chill than energetic so I don't think there's a chance they would actually fight maybe in games that's where they would fight if they met.
Why is Saitama scared he doesn't even know them espicially with his personality and tbe video showing small feats that saitama can easily do why would he be worried