What’s the most shocking betrayal story you’ve ever come across?

A disturbing case swept the news headlines this week. A French woman whose husband has admitted drugging her and inviting more than 80 men to rape her over the course of a decade has said she “was sacrificed on the altar of vice” and treated “like a rag doll”.

This is worst betrayal and absolutely cruel, heinous and evil. I can't imagine what the woman is going through. Someone who promised to take care of you and raised children with you put you in the worst situation possible, completely planned. How does anyone reconcile with that?

What are some of the most shocking betrayal stories you've ever come across?