Cuckold contrast fantasy

So i have let's say a classical cuckold fantasy.

I imagine that my fiancee is being fucked doggystyle by more dominant man than me. I can see her ass and back are well sweaty. I am kissing her lips as he is fucking her. I can not hold it so i start to touch myseldf. She sees it and gently slaps my hand away, slapping my face also as punishment. Then she continues kissing me dominantly as he is fucking her even rougher, gasping in my mounth. I love this contrast so much. Hee being dominant and cocky with me and being all subby a d alutty for him. She would totally experience both sides of her feminity at same time.