Bad Boyfriend?

The past few months when I’ve been showering I’ve been taking my dildo, that my girlfriend doesn’t know I own, I’m with me and fuck the shit out of me with it. In there, I dream of her fucking me with a strapon or some strong female mistress telling me that I’m a pathetic excuse of a man while she’s pounding my ass. I cum so hard every time! I really wanna get a butt plug so I can wear it everyday. Am I bad boyfriend for this?