I am a person who honestly sees nothing wrong with sleeping with a married person or someone in a relationship. I never persue anyone, but if they come at me, i don't turn them down either. Atleast if i'm attracted to them. Am I a homewrecker?
I've fucked married guys. I won't set out to seduce them, but if they're wandering, I'll go for it. If they're looking, and they're willing to fuck around, then there are other problems in the home that I have nothing to do with.
In that case, if any one is a homewrecker, it's him, not you.