Divorced a year, normal bs cheating etc. AP and ex only stayed together a month or two after I moved out. Dudes an a$$. Seen him today at the local pool with my old neighbors wife each with a kid along (play date). Tempted to tell my old neighbor what I saw and to be careful that he has no boundaries. I wish someone would’ve told me. Actually met her AP at that same pool the summer before on a “play date”. Am I being dramatic or fair to message him?