What does cop out rationalization mean in that context?
It means that the OP is trying desperately to deflect in a situation where the blame is on her. That’s admitted early in her tome, where she says that she accepted an invitation back to his place, despite the fact that she knew what that meant.
If she wanted to cuddle but not have sex, that was the moment to make things unambiguous. She could have said “Sure, but let me tell you up front….” giving the guy the chance to retract the invitation if that’s all he was interested in.
It seems like you are saying
Now that I’ve told you what it means, you don’t have to speculate.
I mean, have you read the account we’re discussing?
Yep. Word for word. You?