It's the culmination of the whole evening .In itself that moment I can see his balls tighten and the pulsating as he pumps his cum into my wife is intoxicating .I'm already on a high after seeing them kissing ,undressing each other ,her panties slipped off and his hands exploring her pussy as she caresses his cock .The thrill as he mounts her and his cock slides into her wet pussy and the moaning as they fuck . I'm so turned on and my cock is hard and ready to cum ...and then he stops pumping and I can see he is cuming inside my wife and knows she will be enjoying every moment