The problem is the existence of vulnerable dc. They are not our responsibility. They have a mother and father Actually you are WRONG! They ARE your responsibility. Both their parents are addicts, and one relapses, and the other could at any time.
You may not like it, but if they are neglected, and their parents are mostly inadequate, you have a responsibility to report your concerns to the appropriate authorities. Not just offer your home.
They will have an ok time with their dad but it is just him. Not lots of cousins etc. So they won't be stuck alone in a cold house eating cat food but they won't be with their extended family.
Look, I don't usually say this, but your post is either complete bullshit, and you are embellishing for drama, or your family are part of the reason this person drinks. Harsh, I know. You go on about how "happy" you are all, like you don't want that ruined, and how miserable these kids will be eating cat food.
No one is condoning neglect. Yeah, you are.
I would be REALLY interested to know why your family member relapses at this time of year, although I think I know.
Just because SS see no reason to remove them, doesn't mean you should stop reporting things as they happen. Eating cat food is NOTHING but neglect and you are allowing it. Lapsing is in itself neglectful, do SS know she has recently relapsed again?