I watched her apology on Youtube. I find the way she talks about her daughter to be very strange. It's like she's not used to being around kids. If she really did make her daughter sit down, read a devotional with her, listen to her promise her to use her words "more mindfully", that kid must have thought she (the kid) was being punished. I have a hard time believing a 5-year-old kid would be that engrossed in her mother's emotional distress when it doesn't even involve her - and it would be unhealthy if she was.
I also watched her original comment, and she had this happy little smirk as she was leading up to the joke. It wasn't a misspeak, it was a deliberate cheap shot and she should be ashamed of herself.