Boundary issues and me

My mom passed away a month ago, which is still really hard to process even though I'm glad she's no longer in pain. But y'know what's even harder? Watching my siblings fall apart and turn on each other. It's like all the love and kindness that should be there got sucked out of the room, and every time someone texts me or tries to talk about stuff, it just feels... off. We'er all dealing with our own baggage from way back when, but now we're dumping it onto each other. I've been seeing a therapist for over a year working up the nerve to set some boundaries, which is tricky considering how things are right now. Everyone's calling me the villain and the tension is so thick you could cut it with a knife. A text from one of them can make my heart race, and talking on the phone feels like climbing Mount Everest in sneakers. Meeting in person? Forget about it-practically impossible. We've got months before we can even start sorting out her stuff and dividing things up, which makes me wonder how I'm going to hold everything together until then. I guess all I can do is take one day at a time and hope for the best. Thanks for being here to listen if anyone's reading this.