BIL often has days off during the week. He either stays in bed until DSIS leaves with their older DC (4 and 8) or if their younger one (18months) wakes he might eventually get up with her but will sit drinking coffee and watching her play rather than getting her dressed or feeding her breakfast. DSIS gets up at 6.30. She would like to get up earlier to walk their dog but if the DC woke to find her gone they would be distraught, so she doesn't 
She makes packed lunches, feeds the dog, showers, wakes and prompts DC, brushes their teeth and gets their breakfast and then walks them to school with the dog after having usually done some washing too. She did this even when she had severe morning sickness (she's also 7 months pregnant) and when she's had a sickness bug or otherwise been ill. BIL has never once offered to do it and the DC wouldn't want him to. DSIS says he'd get grumpy with the DC and ask her 1000 questions about how to do everything so it's easier just to do it herself.
She agrees it's ridiculous and suffocating for her as she doesn't ever get a break from the DC (she hasn't left the house without them in about six years
) but thinks it's fairly standard behaviour in families with young children. AIBU to think it's unhealthy for BIL to not be capable of doing what should be a routine thing with his DC and that it isn't normal?