Tease him while you are queening him by talking about how he will never fuck you again, only lick a "real man's" cum out of your pussy.
This is to humiliate him that he's being cuckold, and threaten him with denial. It's wonderfully erotic.
In this scenario, It's important to talk to him (while you are queening him) about how other men are the only ones you really want in your pussy from now on, and that you enjoy being fucked a lot, but not by him. Emasculate him by telling teasing him about his little cock and remind him that that’s why you think the chastity device is appropriate. Tell him to get used to tasting a Real Man's cum in and around your pussy.
Do this when he's locked in chastity, and has no real prospect of being released.
Whatever you do, don't let him fuck you afterwards. Make him repeat to you understands that he's not allowed to fuck you anymore.