Your wife got a little excited. She closed her legs too fast.
Evelyn shot Cross by his arm.
In The Two Jakes, Gittes's trauma over Loach's shooting of Evelyn (which led to Cross's gaining custody of Katheryn) leads him to get catharsis—for himself and the audience, as the flashbacks to the end of Chinatown make clear. As Loach himself is presumably dead, he has to settle for his son (who gleefully taunted Jake with the memory). It's enough.