is it wrong to have casual sex when both partners have strong emotional feelings but aren't "exclusive"?
How would that be wrong? No strings attached. It's pretty sweet. Unless you're the jealous type. Better not try that.
if she really cares about you and would in the near future like to be in a relationship with you, even though your not technically doing anything wrong. she would more likely than not be pretty cut if your out there slaying random poon tang.