@Pain66
It was his mistake though. If he was interested in her, he should have hit on her and ask her out when he met her, right at the beginning. Basic rule: Never provide relationship perks without a relationship.
Women decide if she will sleep with you in the first 5 mins. After that, it's just her wasting your time shit testing and most likely extracting all she can for free - it's on the man to cut her off.