Hi Faithforward444, welcome to the group

So glad you reached out for support around dealing with pwPDs (people with personality disorders).
Lots going on in your family -- both a stepdaughter and a husband with traits is a full plate, to say the least, and it's impacting your other relationships, too.
How old is your stepdaughter? Does she seem to accept her diagnosis? What's her level of involvement with treatment (rejects, neutral, participates, etc)?
When did you start to notice the PD-type traits in your husband?
And, how old is your daughter -- close in age to your SD (stepdaughter)? Are they both still living at home?
Asking because it sometimes makes a difference who lives at home and who lives away, in terms of approaches to managing the "intensity" (there's an understatement, I bet)...
Looking forward to hearing more of your story;
kells76