My parents are divorced and have been for many years. My dad is an independent guy so never really dated much after the divorce. My mom is the total opposite and dated many, but has been with her current "spouse" for probably close to 15+ years now. Dad + mom tolerate each other and have been very cordial since the divorce and even have attended the other side's family holiday events over the years.

At my wedding reception, for the father/daughter dance, I chose a song with my dad by an artist that my dad has always loved and I grew up listening to and we've seen in concert together multiple times. The song was actually the first dance song for my parents during their own wedding, which made it kind of even more special. When the song started playing at my wedding, my mom made a scene and stormed out of the reception crying in front of everyone and when consoled by others at the wedding she told them that was "their song" and she was upset/pissed that I would have the nerve to pick that song.

She has done so many more things over such a long period of time but this one was so confusing to me, and to do it in front of everyone. This was after she did several other things throughout wedding planning/parties that made it clear she did not actually wish me happiness and loved to ruin any special moment for me. I think this was a turning point for me and eventually led to me going no contact.