How to write a prenup?

Please please please my husband agreed to doing a prenup with me and I can put whatever I want in it. It’s for my protection and because I sacrificed so much to be with him. Now tell me what kinds of things did you include in yours?
I do want to add in something about housing, custody of children, and an amount he should pay me if we ever got divorced.
for example his sister would get 30k if she split with her husband (not American money)
I expect a good amount since my dowry was low
How to write a prenup?
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