The last time I interfaced with  mine was as we walked out of court after the Judge signed the divorce decree.

I did run into the XILs a few times. The first time was 5yrs post divorce. I was with the DW and my SS.  I stopped cold in my tracks, apparently turned Ghost white, and got very quiet.  Quiet is not my usual thing.  I briefly introduced my bride and our kid and asked DW to go get our table.  My XMIL had smoke pouring out of her ears as she was doing the mental math on how old my SS was.  My XFIL was just standing there with tears running down his cheeks.  He had major issues that his daughter had never had our marriage annuled, had multiple out of wedlock spawn, and continued to attend holy communion in violation of the Catholic Church. We married in a Catholic cathedral.  I am not Catholic so no annulment was not an issue for me. It tore my XFIL up.

I could not immagine running into my XW.  During a business lunch I did see her at a restaurant once.  10+yrs after the divorce. She was with her DH#2 and their two young OOWL spawn.  She looked like shit. Tired, worn out, and old. She was in her early 30s and looked 40+.  It was sad. She was a beautiful young woman when we dated and married. She was a college athelete.  The worst thing about seeing her at the restaurant was that she was being an absolute bitch to her DH2 and their boys.  

She did not see me. Fortunately.