The story is in the Loving Wives theme, but may not be under that category.
The MC is married to a woman who goes off with three friends climbing mountains around the world. He finds pictures of the four of them having sex on a mountain with signs putting him down.
He ends up making it public and embarrassing her (her parents are rich and famous) and the rest of her friends which breaks up their relationships. She eventually admits that she only really married the MC so her parents would get off her back.
The MC is married to a woman who goes off with three friends climbing mountains around the world. He finds pictures of the four of them having sex on a mountain with signs putting him down.
He ends up making it public and embarrassing her (her parents are rich and famous) and the rest of her friends which breaks up their relationships. She eventually admits that she only really married the MC so her parents would get off her back.