Milly-Molly-Mandy Meets her Great Aunt

From Milly-Molly-Mandy Stories (1928)

SUMMARY: Milly-Molly-Mandy's great-aunt Margaret comes to visit.

In discussing relationships with Aunt Margaret, we learn that Milly-Molly-Mandy's main family tree works like this:

Grandma (Emily) m. Grandpa
|
------------------------
Uncle (m. Aunty (Alice))
          
Mother (Mary/Polly) (m. Father)
|
Milly-Molly-Mandy

Interestingly, this is never made clear anywhere else (although the names are only revealed later). Presumably, though, it explains why Uncle (as the son of the house) gets to look after cows and chickens, while Father only grows vegetables.