AITA for not wanting to care for my dead wife's disabled son from a previous marriage?

As someone who has a severely autistic sibling, the biggest worry my mom has is what will happen to my sibling if my mom suddenly dies. They won't be as loved, as cared for, as they were when she was alive. I love my sibling, as difficult as it is, and I would do my best to make sure they are cared for, one, becuase I love them, and two out of respect and love for my mom.

I get that "technically" you aren't the guardian and you don't have to, but to just wipe this kid from your life becuase your wife is dead, so you've got no obligation now is just... so slimy to me. You had no problem helping him before, but once your wife died you wipe your hands clean of him? Yeah, she's dead and isn't around, but I bet she would be so sad about this situation. My mom always said she wants my sister to "go" first because of stuff like this. No one cares for these kids the way the parents do.

/r/AmItheAsshole Thread Parent