Whose the eviler in this scenario? Is one partner more complicit than the other?

This girl has a boyfriend who is deeply in love with her. I'm atrocious to this boyfriend in question: I mean, I absolutely torture him. However, while I haven't been conscious about it, I've had sex with this girlfriend roacously all of the time. Not only that, everyone has told this girl that if I was in her, their, close sleeping quarters that this would be an inevitability of her having sex with me. I mean, this is extremely noutious and what not but this is what it is. When we're alone in private we're extremely intimate with each other and she calls me honey and says that she wants me to be her boyfriend, wants us to be a couple, etc. Could a relationship stem from this? Or, are we already a couple? Or, with all of this being said, who would you say is the eviler of the two? Me or her? Or, are we both equally complicit in all of this? Or, am I an evil person with evil, piggish desires respectively? I mean, when we're alone, the love, sex, and romance really, really, kicks in.