Not once but three times..
first time I can forgive as she was a newborn and we were both new parents and sleep deprived but he’s done it twice this year. On Xmas day he didn’t strap her in, I was already in the car with the dog waiting for them, and we drive five minutes on a 60mph road before she announces she’s not strapped in her car seat. She’s only four. We have been really struggling with communication and I feel like he’s very thoughtless. I have been contemplating divorce and don’t want to overreact to this but I am concerned.