Considering what we all know about RED Scout's mother, I honestly don't think she would care if one or two of her sons were in jail. After all, she did allow her older sons to abuse her younger ones when they were children.
As the Scout didn't finally have other options than learn to run we can assume bullying and physical abuse went on for numerous years. I bet it's difficult to manage with 8 sons but that's something you just can't miss as a mother. Unless, of course, she didn't care. But yeah, enough of analyzing. I'll just carry on -->