After you give Shay several orgasms, she gets up and says:
"Now I need you inside of me! But I have to keep you from cumming! Do you think you can hold it back?"
No, you say you are way to excited for mere will power to stop you from cumming if you were to be inside of her again. The mere thought of it is almost enough to make you shoot as it is.
"So we'll have to use a cock-ring!" she says triumphantly. She produces one and puts it over your swollen cock, using some lubrication so it slides on. Sliding it on feels great, but once on it starts to really constrict your cock mightily.