The Farmer in the Dell by Kathy Parkinson
We really enjoyed this "book you can sing." The illustrations are charming and very detailed. Juliet liked that she could "read" it all (since she has the song memorized). The illustrations show the farmer "taking" a wife (they get married), the wife takes a child (has a baby), the baby takes a nurse (a nanny comes to live in the farmhouse while the wife must go out to gather vegetables and tend to the animals), etc..
It's fun and cute--we loved it.
Juliet was playing with her playmobil farm set the other day and she picked up this farmer (the only person in the set) and said to me, "He needs to take a wife."