Being borderline doesn't automatically mean one is abusive or bad of course, most men who are abusive and dangerous are not borderline. Borderline people suffer very much, so I always have a soft spot for them. Back to the fiction; the problem is that Yuri is manipulative, and the lengths he would go to control Lee are obvious, soit's a dangerous situation for Lee because he can't predict what Yuri might do if he ever did something that wasn't to his liking