When I saw Mary Rose on the English census and realised she was older than John Patrick, who was on the Irish 1901 census, I wondered where she was as she would have been 2 years old.
Found her 1901 North Street (Skibbereen, Cork)
Head David Twohig age 35 born Cork, Ireland Revenue officer.
Wife Hanna Maria age 29 born Cork.
Niece Mary Rose 2 born Cork.
She must have been on a sleep-over at her uncle Dave's, which worked out well for you, as it gives you Michael Dennis Aloysius's brother.
Chapel Road (Middleton Cork)
Head David 45 born Cork, Customs & Excise Officer.
Wife Hanna Maria born Cork.
Daughter Mary Josephine age 5 born Cork.
Daughter Norah Christina age 4 born Cork.
Son John Patrick age 1 born county of Kings (Offaly).
So Sandrapeters863 was on the money.
Both of the sons Michael & David born England & Ireland, fits in with what she told you 7 replies back.