Car Loan Question

[Youssef Ltaief]

Hello
my situation is as follows. I have a pending car loan that I correctly setup up a couple of years ago. A few months ago I decided to give the car to my sister but keep paying the loan. She is reimbursing me for the monthly payments.
I use the payments I make against liability:principal and expense:interest. How would I record the reimbursements my sister pays me every month?
Any help is appreciated