Space Cowgirl

Standing on tip toes for a minute without letting your heels drop, but while wearing a vibrator at top power, and for every second you don't make it you get a spanking

Recite the alphabet - simple enough - but wearing a spider gag which makes it near impossible to speak, and for every unclear letter it's a day of orgasm denial

Sit on a series of increasingly large dildos all the way to the hilt, and then the one that is just too big, that you fit into your tight hole, is the one you get fucked with until it does go to the base

Have we considered sub getting fucked stupid on a cock and repeatedly moaning "you're mine, all mine" to the dom

Read them to her.

Eat her pussy.

Fuck her.