AITA for telling my sister that the baby’s death is on her?

My sister had her first baby 6 months ago and the first 4 months of her son’s life, my husband and I helped out a ton. <br><br>We live about an hour away from my sister but you would think we lived next door or something by the amount of times my sister and her husband wanted us to come over to help. Sometimes my husband wouldn’t even be home and I would go to their house but I guess my husband had more free time to get there than I did. <br><br>A little after the baby turned 4 months old, my husband and I told my sister that we couldn’t keep driving an hour to their house and back anymore. They live in a big city and always had a lot of family and friends visiting to see the baby so I’m not sure what else they expected of us. <br><br>Well, one night my sister and her husband went out to get some food and when they got back, they found the baby dead. My sister was in a state of panic when she called to tell me what had happened and said she’s going to miss the baby’s funeral because she’s getting a psych exam at the hospital. <br><br>Now I have no idea if this is true but my BIL told me that the baby had been left alone for a while. He said they had left the baby sleeping in the bedroom and when they got back, they found the baby face down and dead. <br><br>My sister was released from the hospital after only a few days and she came to my house to talk. She kept going on about how she can’t live with what she did and that she misses the baby so much. I told her that I feel bad for her but the baby’s death is on her and her husband for leaving him alone for hours. <br><br>My sister hasn’t answered the phone for me since but I have gotten a lot of calls from other family members telling me that I’m a horrible person for saying what I did and that my sister will never be the same after what happened.