I am re posting this and adding some information.
I normally have my child on the weekends but this time my ex asked to take him with her and her husband to his parents 6 hours away for labor day weekend bash but at the last minute she gets sick and stays home by herself. My sons step dad is a nice guy(what little I know about him) but he is not his dad and also is not very good at disciplining my child and making him “mind”(from what I am told he doesn’t do that with his own child who isn’t going on this trip). From what I have heard about these “shindigs” is there are lots of people and lots of alcohol and I am worried that my son(who is 9) will sneak away unsupervised and get to doing something he hadn’t oughta be doing since his mom has let him “taste” alcohol and mixed drinks at her house.

I was not informed that she did not go until it was too late, otherwise I think my son should have stayed with me.

Is this wrong of my ex to allow this to happen? Should I jump her *** about this? Is this something I could use against her in court?

Some info on my ex: she cheated on me for years and allowed my son to be involved with her boyfriends and their families during their outings and even(when asked about it) told the judge during our divorce she didnt see anything wrong with it. I know for a fact that she is cheating again now with my sons teacher because I saw her kiss him outside in public and my son told me beforehand she was doing this.
So I doubt she was sick and if she was it was very coincidental.