I'm an adult child with a parent who has BPD, the other NPD. They, primarily the BPD one, have been trying to confront me about an issue with another relative. The relative has cut contact with them and for several months now they have been trying to gain validation and information from me about that family member-- they knew we were still in contact. I have no issues with that relative but stopped talking about him anyway to stop this circle of drama, I would only give my parents vague responses and remained emotionless about it when asked about him. Now they're blaming me for the relative cutting contact, saying I must have told the relative something bad about them. They're imagining the worst, which is expected, but I thought by now they would... get over it, I guess, or taper off. Instead they keep coming to me asking trick questions like, "Was I really mean to him? What did I do wrong?"

They want to "take me aside" again to ask/interrogate what I said to him. Frankly I don't really remember all the things I said, and I know I have no real influence on what my relative does. Both myself and the relative knew they were crazy. I am financially dependent on my parents still, the relative has the freedom to live alone but cut contact because they were harassing him via text and through his friends.

Should I sit back and bullshit my way through like I've been doing recently, like nodding along with vague, "I don't remember, not really, probably, yeah, I understand he's being such a prick to you and you're right to be upset about it." Or try playing the broken record? As in, just restating over and over something like, "I understand you're upset, but I don't have anything to tell you. We can't do anything about him." I end up getting agitated and anxious about the interrogating they do, so should I add anything about how it's affecting me? They keep taking my anxiousness as an indication that I'm lying or something. "I don't have anything different to tell you, I haven't heard from him. But you keep coming to me and asking, it's exhausting all of us."

Opinions, folks? Should I try addressing the problem a bit by restating how this thing is exhausting and pointless, or sit back and appease them like usual?