I can't say that I'm a fan of a mc that's forced to behave like an ass when he doesn't want to. Either just make the mc an ass or don't.
I just can't see anyone not taking extreme steps to explain his situation to anyone who could help.
I would think that his ED was caused because of that spell. He gave her almost all of his vitality, so him not getting it up is understandable.
I think he agreed with her assessment, so she could stop trying to jump his bones while they're stuck.
And I'm calling it now, down the road he's...
Here it is. I've been waiting all this time for her to catch up to him. She's definitely more unstable now. And I wouldn't be surprised if she pretty puts any woman near him for to long into the "threat" category.