I read a story some time ago of a couple attending a party. There were some games in which 2 partner perform some sexual act and wife was too shy to perform any sexual activity in front of her husband. So she made her friends take her husband in a bedroom in each round one by one so she could perform easily. In the end the husband end up seeing his wife performing in front of everyone.
Source: reddit.com/r/Erotica/comments/tygmkg/need_to_find_a_story_help_me_find_it
Nevermind, found it.