I agree someone has to advocate for the kids. What is your relationship like with his ex? I’m guessing she is well aware he’s an addict but it’s hard to understand where she stands in all of this. Does she knows he’s using again? Does she even care? Is dropping her kids off a break she needs that badly. Is she an addict?
I also agree with anvilheadII - it didn’t seem to bother you about the kids when you were with him? Didn’t see any posts about that until today. And now that you think about it maybe you don’t want to really get involved.
Hummmm
Do you feel in your heart that the children are in danger if left alone in his care? Do you feel the ex would understand your position now – one that could be, you are no longer in this relationship due to the fact he is using again and since you are no longer present to help with the children while in his care, you worry about them alone with him while he is under the influence.