So I had an affair with a woman in Oct-March this year. She said she was in a hostile and unloving relationship and that there were only living together for the sake of the kids. She told me she would leave her but needed to find the right time to do it. We had a full blown affair and her partner questioned it a few times but she told her nothing was going on. Fast forward to Boxing Day and her partner kicked her out. She ended up living with her mum for a few months and messaged her a whirlwind of abuse about everything. She still to this date doesn’t know about the affair. She told me she loved me and needed to leave her so we could start a relationship and build a life together - or so I thought. In January they both decided to meet up and agreed to start taking things slow again and I was so heartbroken I stupidly od’d. she then told me that she was only getting back with her for the sake of the kids. She then gave the impression that she’d cut ties with her but remained friends for the sake of the kids but paranoia got the best of me and I thought something was going on with them two which she kept trying to deny. Fast forward to now and I had a chat with her and said I can’t remain friends with her and watch her play happy families from the sidelines after everything that happened but she couldn’t understand the issue of remaining friends but it just hurts too much. I wasn’t sleeping at all and everytime we hung out I’m left with a night of grief of it never going anywhere. After our chat she said she only ever wanted her partner back and it’s destroyed me! They’ve had a family holiday booked for the last year that they’re going on in August and part of me wants to message her partner once they land and tell all. Do I do it or let karma do its thing?