I would consider puting some boundaries around her drinking and driving with your children. You know the details more than I. My ladies X picked up her daughter and drove off, then we both looked at each other and questioned his sobriety. We decided then and there that we would not do the exchange if we susspected him of drinking and driving.

Just my 2 cents.

"What is best for my kids is best for me"
Amor Fati
Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712