there is a family who has 2 children aged- 4 and 2, and whenever I see them leave the children are not in safety seats. When I brought it up to mom she said that she never used a safety seat as a child and is fine..(well- a lot has changed in 30 years).

Husband says to leave it alone- they are her kids, but I cannot stop the thought that, if heaven forbid something were to happen, I would feel guilty for not intervening. What is the best course of action?