u/Horror_Ad_4450

Sorry, this is going to be long. As a follow up to my previous post, we passed our home inspection and my nephew is with us.
My sister is allowed to contact me to talk to him via phone call. I told her that I am keeping everything in a neutral tone. And I even showed my response to the caseworker. My sister texted me last night saying she doesn’t want my mom to see him, only my other nephew (big bro). My mom currently takes care of her older son.
I’m not sure if she can detect that or what the rules are for her. I texted the caseworker so I am waiting for her answer.
My sister blames my mom for the current situation but I don’t know all the details.
Regarding the dad, none of his side of the family would pass a back ground check. I don’t know them personally to gave an opinion their current state of sobriety or lifestyle.

My nephew was recently placed in a foster home due to an incident with my sister. We have a strained relationship due to addiction and mental health (bipolar). I have tried to help her in the past to no avail. I had to back away to protect my own health as well as be present for my son and husband. I always feel guilt that I haven’t done enough.
My husband and I agreed to be a resource for her younger son mentioned above. I have a caseworker coming next week to do a home visit and go over paperwork.
My sister was told my name by her public defender and has been calling and texting me. I am afraid to even look at the texts and or answer her calls due to jeopardizing the case with her younger son who will likely be placed in our care.
Has anyone dealt with how to handle contact with bio parents before? She can get volatile and frantic and I don’t want any of my words twisted. Which has happened in the past.