I totally know what you're going through as far as your mixed feelings about reporting T.....I have those same feelings about my ex-husband. He needs to suffer the consequences of his actions, but yet there's times when I feel weak....focusing on the good parts and minimizing the bad....and ultimately feeling stuck.
Luckily for me, my ex continues to do things and say things that knock me back into reality....But it is oh so hard during the weak moments.
And I'm so sorry about your guinea pig. It is so hard to deal with death with kids. We had a cat that died when my daughter was younger, and it was incredibly heartbreaking to tell her and deal with her horrible feelings of grief and sadness. I didn't want my daughter to hurt, and there was nothing I could do to make the hurt go away.
I learned, though, how important that lesson was - because she was able to understand death at a young enough age so that when her pop-pop (my dad) died when she was 5, that wasn't her first experience with death. He dropped dead right in front of her....and I still don't think she's processed it.
Death is so incredibly hard - for adults, let alone having to deal with the pain of grieving children.