I'm an ACoA, so I'm usually super protective of children in A families. However, I'm not sure if there's anything you could do for these boys without becoming enmeshed with your XAGF again. Do you ever see them just around town? If so, be sure to be kind to them. Treat them with respect, but don't become Creepy Uncle ZenMe. As they get a bit older, they will probably gravitate toward you if you are able to maintain some sort of contact. This is just one of those tricky situations where those kids deserve so much better, but you can't really be meddling in that family's business.