Контекст такой (цифрами обозначены люди, участвующие в разговоре):
1: Grandma will be mad at us. We gonna get a huge trouble.
2: You are too worry about it.
3: I rest my case.

Помогите, пожалуйста, перевести на русский язык верно.

McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
I rest my case.
something that you say when someone says or does something that proves the truth of something you have just said 'It's time Nigel left home, or he'll never learn to be independent.' 'He doesn't even know how to boil an egg.' 'I rest my case.'
See also: case, rest

Cambridge Idioms Dictionary, 2nd ed. Copyright © Cambridge University Press 2006. Reproduced with permission.
I rest my case (spoken)
you have proved that what I just said is true Ned's mother said he needs to leave home or he'll never be independent. His sister said, “But he can't even do his wash!” and his mother replied, “I rest my case.”
See also: case, rest

+ Что и требовалось доказать.
+ И я о том же.
+ Это только подтверждает мои слова/то, что я говорил.