I'm a Dom and think this is too mild. Since they fucked make them regret fucking AND deny them what they want. So my suggestion is to make an evening of it...several evenings of it,
1) Have the wife buy a female blow up sex doll for the cuck. Give him 24hrs to give it a name and buy it a sexy outfit. Have him sleep on the floor with his "girlfriend" until your Saturday date. He is too abstain from ejaculating at all this week.
2) Pick up a male sex doll for the wife and wrap it up with a bow.
3) Saturday the cuck is to carry his new girlfriend around wherever he goes. Present the wife with her present, lol. When she opens it have her blow it up immediatly and tell her to give her "date" a name. Then send them both upstairs to strip.
4) Have them fuck their new partners. When the cuck cums he's to scoop it out and feed it too the wife. Then tell him he has 15 min to fuck his date and cum again. If he fails he has to drink 3 glasses of water. After he drinks the water he gets back to fucking. Keep this up untill his belly is full.
5) The entire time the wife should be fucking her date. Make sure she cums. Make sure she makes her date feel like a man. Coach her, make her rub her clit till she cums and cums and cums. If she's not making her date feel "manly" she drinks a glass of water, if she doesn't cum enough she drinks water. Keep up steps 4 and 5 for a looong time. Enjoy the scene. They'll look rediculous and will feel rediculous.
6) They should be begging for relief from their bladders in a while. Make them suffer. Since they just had to fuck each other you're now obligating them to fuck. Now you're making fucking more important than bodily function. When you think they've had enough have them get dressed. Underwear, pants, panty hose the whole 9 yards. Then send them outside to piss on themselves. Just like pathetic babies who can't control themselve have them stand in the yard and piss in their own clothes.
7) I suggest you hose them off before bringing them indoors. Soap, bucket and you with the garden hose.
8) When you've gotten boared with that, send them inside to clean up their dates. They should give the dates baths in a nice warm tub.
Those are my ideas. It should give you room to add your own twists. Since she hates swallowing cum, don't forget to find a spot for yourself to use her and dump loads in her yap.