My Cuck Fetish

So here's my confession. It's about a fetish or fantasy I've had for quite some time.

I'm 27 years old, my girlfriend is 25. I love her very much and find her really attractive. She's a bit bigger than usual, with curves and amazing tits, but I'd say she's more curvy than overweight. The sex is great, even though she's a bit more experienced than I am from before we got together.

Anyway - my greatest fantasy is her getting roughly fucked by my dad. Mouth, ass, pussy, you name it. In my fantasy it's usually not consentual, but I'm in the room watching and we have eye contact as he roughly fucks her mouth or fucks her doggystyle.

I've thought about this numerous times while fucking her and considering the amount of times I've caught my dad sneak peeks at her tits (which I love), I reckon he has as well. I know nothing's ever going to happen here and it's going to remain a fantasy, but one night when we were all drunk and he basically spoke ot her tits instead of looking at her face while talking to her I got so hot I just had to fuck her as soon as we got home.