Cuckold Time Machine: Watching My Wife With Her Big, Black Boyfriend

Like any man, he's always wanted to know about his wife's ex-boyfriends, so when Mike gets his hands on a time machine, the only thing he can think of to do with it is go back in time to watch his wife with her boyfriends of the past! He starts with her big, black, athletic ex, and gets to see her take it hard and unprotected – but he's shocked by what kind of woman his wife was before he knew her! She never told him about - well, it's too dirty to write about it here, so look inside for a taste.
This story is approximately 9,000 words.