Thinking about Donnie having a setup under his desk where you could be held in place, comfortable and secure with his cock in your mouth while he sits and works. Him teaching you how you breathe around it, how to relax your jaw and stay still while he uses you to warm his cock and occasionally thrusts into your throat. Getting you into the headspace where you feel so good being used. Strapping a vibrator to you and getting to feel your moans and whimpers around him. Murmuring little words of praise each time you come. Breathy curses as he grinds his hips, having to pause in his work because he just wants so badly to ruin you that he can barely focus but... not yet. A little longer, just a little longer. He's going to make sure you're nice and fucked out, unable to use that mouth for anything but sucking before he drags you out from under the desk, replaces the cock in your mouth with his fingers, and finally presses himself inside your cunt and fucks you like you want. He's going to make you forget you were ever anything other than his toy, make you forget that you exist for anything other than taking whatever he decides to give you. If he ever does leave your mouth unoccupied, the only words he ever wants to hear are "Yes Sir" and "Thank you."