How does she feel about you bullying her dad? Does she not notice, not care, enjoy it, or hate it but still give it up whenever you demand?
As for ideas, there's plenty you can do, but it depends on if she's into it, n if you're willing to risk going too far n loosing her (or if you can take her dad in a fight, if he does grow a pair n try n protect his little girl) and what you can get her to do.
You're obviously already making sure he hears her moans and screams when you fuck her just down the hall, and showing him you don't respect his daughter enough to romance her every time you want some (something I imagine he had to do every time he wanted in her mum's pants), but the next time she's at your place, you could tell her to phone her dad, n make a game out of if she can keep her voice normal while you're fucking her, with a punishment if she hangs up before you nut.
You can also get her to call your daddy when fucking. Start it as just the usual sexy talk, then edge it further and further, till calling you daddy comes natural, while calling him any version of dad feels weird. Rob him of his title of Father, and that magical father daughter relationship to get your rocks off.
If her mom is still in the picture, you can also make comments about her to him. Things like how he was lucky to bag a fine piece of ass like that, and how you're lucky because you get to fuck an even hotter version of her. Though that runs the risk of upsetting her (you can tell him that even if she's no longer in the picture too if you really want to be a dick, and add how it's a shame you don't never got to meet her, as you're sure she was probably almost as good a fuck as his daughter)
All depends on how subtle vs in his face you want to be about it.
Be sure to let everyone know what else you get up to with her. Always love to hear about someone loosing the girl they love most in the world, to someone who only sees them as a fuck hole. (As long as it isn't happening to me 😂)
