Just going to address a few issues.
1. Mandatory reporter. Ethically and morally speaking, we're all mandatory reporters. What being a mandatory reporter does is make it easier on the person doing the reporting and easier on the victim as well. It's "hand up in the air" sorry I have to do this I'm mandated by law and it takes the person doing the reporting out of the middle. But the mandated reporter has to see something, a bruise, a kiss, a back rub or something that rises to the level of being reportable not just gossip or a feeling.
2. Rules regarding teachers and students outside of school are fairly lax and they need to be. Let's say you're a teacher at a school and your children attend that school, what would you do if you could never have a student in your car or home? Rule of thumb is to be cognizant of the fact that these are your students and to act appropriately. You are not just another parent, you are on a different level so remember that. It's the same with other parents, you can fraternize with them, but maintain a professional boundary.
So I personally don't have a problem with the rides to church, what I have a problem with is the undercurrent of the narrative which is "I had this woman in my home, part of my family and she stole my husband" nonsense. I get that they married young, at 18 and 19 years old, but TC is not 19 any longer, he's 50. And ET isn't someone who stole someone's man, she was abducted and had no control over the situation This was someone in power over her on a daily basis, someone who called the shots, much like a prison guard who has relations with an inmate. Except this was a previously abused child who had no friends, family or guidance in how to navigate this situation and when TC was caught, she was bullied by not only her peers but by the staff who worked in that school. No wonder she felt she had no alternative other than to bend over and do what she was told. I'm sorry for the Cummins family, but they had childhoods, and teen years, and school, friends, marriages and children. ET has had none of that experience and just when her life was turning for the better, TC swooped in and really mucked it up. If he has any humanity left, anything worth forgiving, he'll let that child go and finally have a chance at some semblance of a normal life.