She wants sex, but not from you. There is ABSOLUTELY no reason for her to lie and gaslight you, none . IMO, any woman who turns down sex to masterbate is wanting and fantasizing about someone else, sorry but that's my personal opinion and the same can be said about men. Call everything off and get your ring back, because she just showed you what that she's a liar and manipulator and she doesn't care! This says everything about what kind of person she is and she just proved that you can't trust her. Find someone who WANTS you who won't lie and manipulate and gaslight you.