Background:
Family members Maud and Gigi had a tantrum about arrangements for a family event having to change and told A LOT of lies about it/me/my DGM to Maud’s partner.
Maud’s partner than sent a vile and aggressive message to myself and my DSis.
I have been as low contact as possible, but have seen them and been civil but they definitely know I’ve been majorly let down and affected by this.
The dilemma is I have proof that Maud’s partner is having an affair. Their own relationship began with Maud being OW so I’m not surprised this has happened but still feel sad for her.
I don’t know what to do with the information/proof I have - I think if I tell then I’ll be deemed as being spiteful. I genuinely don’t know what I’d do if the lies/abusive message hadn’t happened. But whatever has happened, I do still care about Maud and this would have a major impact on her and Gigi and maybe it would be better if they’re forewarned? Would it be hideous of me to do it anonymously?