Can't find a story !!

[rohanradar]

I read a story on cheating where the wife invites a co-worker who is flirting with her home for dinner with husband over the weekend I think. They later start watching a sexual movie and everyone gets horny and this lady and her coworker do it under the blanket and the husband keeps asking what is happening. He is present in the same room as them. Please help me find this story.