What should I be doing now? (It's done)

[Coconut]

I never told my son when I was coming down to Fl, since he never asked, so he didn't know I would be at his wrestling meet last night, and he was pretty surprised when he saw me in the stands.. He was pretty excited, so that was fun..

About an hour after I got there, Stbxw walks in with some guy.. Ok, that was a bit jarring, but it wasn't too bad (just a good thing it wasn't the OM).. She didn't see me and went to talk to son, and the other guy sat right in front of me 3 rows down. I considered fckn with him a little bit, asking how it felt to know his gfriend has a husband, but he doesn't have anything to do with me, so I just let it be.. My STBXW at some point saw me or was told by son I was there (not sure) went to sit in another section of bleachers and motioned for the other guy to move over there.

I had invited my brother and a friend to the meet, and my sons gf also sat with me, so we were all talking and joking, so seeing her and the guy didn't bother me too much and I was able to chill and annoy the meet.

Went out to dinner with son and friends afterwards, and at some point mentioned my families Christmas party to son, and he says I really want to go but I don't know how long I can stay... Why I asked, and he says mom made dinner plans at grandmas house... I just said ok, well let me know, cause I was fuming and wanted to think it through before saying anything else.

Decided to just text my Stbxw rather than putting my son in the middle, and told her I was upset that she made plans for him with grandparents instead of spending time with dad at his families party. She replied that she would see if they could change plans.

So we will see what happens, but overall I'm pretty happy with the minimal impact that seeing her with someone else had on me, and feeling comfortable with my decision to push the D through.