Hello dee869. I'll join Kwamina in saying

I'm sorry you find yourself in the position of having a husband with BPD, and now possibly your son. You've come to the right place for some support.
Like Kwamina, I'm curious about what behaviors you have seen in your son and husband. Sometimes children may take on some qualities from their parent with BPD, but it doesn't necessarily mean that they are BPD.
You may want to read about
BOUNDARIES: Upholding our values and independence and see if there is anything in there that will help you to deal with the verbal abuse you mentioned.
Please tell us more and we will do our best to support you on your journey.