ss, this may not be popular opinion in terms of DBing, but I think your daughter's safety is worth bringing up and trumps your H's feelings. I wouldn't want to give the impression that that was okay going forward, and I think there are ways to handle it that don't have to lead to accusations or issues.
What about something like, "I understand being in a rush and not having time to deal with her seat in the moment. Is there a time in the near future that we could install the seat in your car so that you don't have to worry about it anymore and things will be a bit easier in the morning?" That way there's no insinuation that you care about her safety and he doesn't and you're working together at a time that's convenient to fix the problem. Plus, it's framed in a way that's of benefit to him without you directly stepping in to fix the problem.
M - 34 H - 36 Together 10 years Married 4 years BD - March, 2014
