If you think it's OK for her to be with you when you are surrounded by hordes of mostly naked girls, who are want to sit with and probably spend a night in bed with you, then I'd guess it's OK to bring her there.
Did I mention there'd be bevies of unclad women all over the place?
Yeah.
p.s. Telling her it's 'RA', esp. with Thailand's reputation probably wasn't the best idea if you ever want to be able to go there alone/with friends. Unless you're swingers. Then it's OK. Possibly.