Hi Ariel,
This sounds like such a difficult situation that you’re being put in the middle of and that isn’t fair on you at all. Your partner and son are both trying to make it your responsibility to manage the other’s behaviour when they’re both adults who are responsible for themselves. It’s really not right that your son is making threats of things he’ll do to your partner to try and control your decisions. You deserve to feel safe and peaceful in your home and not be expected to manage other peoples conflict or emotions for them.
Take care and keep posting,
Lisa