Mine only hug when I make then start talking to each other. If the two don't know each other well then instead of hugging they must get up and wave to each other first before talking. It's annoying when they are sitting down to eat and they keep picking their plates up and all that. I removed my mods completely to make sure it wasn't me and it still happened so it's definitely not a mod issues. Yours sounds way worse than mine though. Make sure you have patched your game with sims studio too. I always go there first when I have a problem and it's been a life saver many times. Good luck to you.