DH and I have mutual friends who are married. It's not a happy marriage and she has now filed for divorce. She would confide in me both in person and via Whatsapp what goes on and I would be sympathetic, offering advice and opinion where appropriate but always careful to never outright say LTB.
Anyway he got hold of her phone and read our conversations. He then phoned MY DH furious at what I'd been saying, accusing me of being a snake and DH better watch out as I was probably plotting against him.
DH put him straight but now I feel vulnerable and exposed and no doubt he will confront me when I next see him but I don't think I said anything I wouldn't say to his face plus she is entitled to cry on a friendly shoulder.