S = Substitute What would have happened if Mary hit Patrick over the head with a pillow instead of a frozen leg of lamb?
You are my everything!
I'm not going anywhere! You're my true love! Please forgive me.
If Mary used a pillow instead of a frozen leg of lamb, the entire plot may have changed. Typically, when people use pillows to hit others with, they do so in order to be playful. So what could have happened is that Patrick could have seen it as a sweet and spontaneous action. This could have caused him to realize how much he still loved his wife. This in turn could have led to him changing his decision and staying with her.