Yes, she really is better off. Her mind and body were so damaged for so long. She was really living in torture for many years. She lost so much physically and mentally, including her dignity. She was completely at the mercy of those in her life who were taking care of her, and she hated that. She was so miserable for so long. By last year she didn't even remember anymore that my sister and I were grown women with kids of our own. She thought we were still little girls (one of her sons is the same age as my middle daughter; we were pregnant together and both on bed rest, so she often called me to chat during that time).
So as hard as it is on the rest of us, I am happy for her. She is finally free of the excruciating torment she has gone through for years. She is so much better off now.