If she could use/borrow my phone

[Topstudent]

I'm writing a script.

Monologue:

So we just sat there, next to each other, drinking in silence for about half an hour, until she suddenly turned to me and asked if she could borrow my phone as hers had run out of battery. She just had to make a quick call. So I lent her my phone. Got it back. After that, we got to talking...

Is 'borrow' perfectly natural here or would you always say 'use'?

 

[Piscean]

Both seem OK to me.