He's done nothing wrong, there's no need to apologize. But it's just the sort of thing one says - and the thing she's said to him before. So he really understands.

She quietly strokes his hair in the hug.

"Donald didn't tell them what happened to me. I... I guess he didn't want them to be angry at me. He just said I was gone one day. But eventually... Donald was low on money and options. He asked Scrooge to be a babysitter, and that's when my boys finally learned he was their uncle. They wound up staying together for a while, bonding, becoming a real family again... until they made Scrooge tell them what happened to me. They blamed him, instead of me, and the family was almost torn apart all over again."