answer: Matt's mom is not satisfied with Matt's jokes about Amy and tells Matt not to take it too far, or it will hurt Amy.
documents: #Person1#: What's all that screaming about?
  #Person2#: I just poured some ice water on Amy, while she was in the hot shower, you should have seen her face.
  #Person1#: You shouldn't tease your sister so much.
  #Person2#: Aaah it was just a joke mom.
  #Person1#: You take it too far sometimes Matt, if my brother had been like you when I was growing up, I would have gone crazy. Remember the time you replaced her toothpaste with hot pepper? And when you put salt in her cake, that was just before her tenth birthday.
  #Person2#: Sorry about that mom, that was a little too much. But Amy likes my jokes, she always laughs about it afterwards.
  #Person1#: She does have a good sense of humor. You are lucky she loves you so much. My brother and I weren't as close. He was 5 years older and if he teased me, I always felt hurt. It's good that you and Amy are only one year apart in age.
  #Person2#: She's my best friend, I like making her scared but I'll never hurt her.