I used to live in a different part of the country to my husband. He used see his sister a lot (and lie about it) because they would smoke weed together at his house. Sister is married. It was during this time he must have told her something deeply personal to me about being abused as a child. I told my fiancé (now husband) this in confidence and am confused how or why he would have shared this, he says he cannot remember telling her.
In an argument, she laughed and said my brother sat back and watched and done nothing about it. I was LIVID.
For context, this is the same sister that when my fiancé tried to set boundaries in the past she has said things like "i wanted to text you but didn't want to seem in love with you" and "i would do literally anything for you" and "i cry myself to sleep because my brother isn't there for me - do you know how that feels"
anyway, struggling to get over such a serious breach of trust. I can tell he regrets it and he does not have contact with her now.