I'm now translating a cartoon to English, and I can't choose which expression I should use here, cause I don't exactly know the difference between them.

The scene is like the following:

> 
> W: Aren't you going?
> 
> 
> M: Huh? Thi-this early?
> 
> 
> M: Ca-can i stay a little longer?
> 
> 
> W: ...
> 
> 
> **As you wish./ I don't care (what you do).**
> 
> 
> 

Here, this woman is saying "if you want to." or "do whatever you want". And she isn't that nice and friendly woman. She's kind of acting a little cold.

Then which is a better choice between "as you wish" and "I don't care what you do" here?

Or is better to say just "if you want to."?