What does jem have to do with mrs. duboses flowers?

Mrs. Dubose is an angry old woman. She insults Jem's father, which makes Jem extremely angry. He grabs Scout's baton and attacks the flower bushes, breaking off the flowers. By the way, this is a REALLY good book- a lot of it is about Jem and Scout- you REALLY should read it- I'll bet you'd like it.