Thank you for saying the quiet part out loud. In no way do I condone TA and the rest of them killing two women. Not at all - but for right now, IMO, her original intent was to protect them from a drug addicted father and the situation TA's lawyer revealed. So TA lets this concern for the kids' safety foment until it gets so far out of hand she's ready to kill.
As we know, there are a heck of a lot of grandparents out there raising their grandkids right now and it's not because they're selfish and on a power trip. They're getting old and don't want to have to raise another family. They do it because both parents are unfit and there's no other choice than to protect them from their parents and raise the grandkids. There are several Facebook support groups for grandparents who were raising grandkids because both parents were unfit to do so. These groups have grown exponentially over the last few years - and are full of worn out grandparents who are raising grandkids and needing support. They aren't doing it for selfish reasons. Again - IMO, TA let this eat her up to the point of being ready to kill anyone and everyone she thought got in the way of her grandkids' safety. I think this is why she so readily took responsibility for the murders. Quite often, I see people on social media claiming, "If someone did that to my kid, or allowed it to happen to my kid, they wouldn't live long enough to see prison!" - when they hear of a child being terribly neglected and abused. Apparently, TA had the same mindset but actually followed through and brought others with her to carry it out. IMO, she won't show remorse because she believed she was saving her grandkids from neglect and abuse. IMO, she'll show resignation - knowing she'll spend the rest of her life in prison - but in her mind, she's justified killing two people.