Forty year old NAME_1 is a bit early to pick up his 30 year old wife NAME_2 from her weekly floor gymnastics coaching job. He ventures inside the gymnasium to say Hello but it's empty. NAME_1 is hearing sounds from the equipment room and takes a peek. Inside, NAME_2 is bent over a cart, her leotard pulled down to her knees, some boy taking her from behind, slapping her round ass. She seems to be a willing participant, moaning like a bitch in heat. There is a line of male gymnasts (14-17 years old) from NAME_2's club with their cocks out behind her. The guys are taking turns fucking NAME_2's holes like a sextoy, while chatting and taking pictures and videos of NAME_2. This seems to be a regular ritual after their training, NAME_2 calls it blowing off steam and team bonding. NAME_1 had no idea this was going on for the last two years. NAME_1 keeps secretly watching his wife take all the boys from her club until the last one has finished deep inside her.
Flesh out and embelish the story.