So my DSS (stepsister) had her children removed by social services last year. Was a huge shock to all of us as we'd had no idea there were issues. She's never told us what happened and doesnt want to talk about it - all we know was that she had been warned on numerous occasions never to leave the children alone with their dad and she did so. They were in the care of a family member (her side) for around 4 months and have now been returned to her care. Her mum has told us dad is "a psycho" and referred to domestic violence and also him being arrested for assault of someone outside the home. That's all we know.
So we've just had an invite to my nieces birthday at the end of the month. I asked DSS if dad would be there, and said if so we wouldn't make it but would plan a fun day out on another occasion (on me) to celebrate DNs birthday. She's absolutely hit the roof. Said I have no idea what's happened and need to stop sticking my nose in. I said that without knowing the full reasons for what happened, I didn't feel comfortable having my kids around him. She then said he's now allowed unsupervised contact anyway (first I've heard of it and no idea if true) so I need to leave the past in the past. She said she's not telling me anything and I'm a nosy parker. She's now not speaking to me.
We usually get on well so I'm a bit startled by this reaction. I think shes probably a bit stuck between a rock and a hard place but unless she's happy to give me more information, and it turns out dad isn't dangerous at all (seems unlikely) then on the limited info I have, he doesnt seem a safe person to have my children around. Just to be clear I'm not being nosy - I don't need to know anything if hes not going to be around my kids. AIBU?