I borrowed my friends iPad recently and logged her out of the apple store and logged in using my own apple id. I did download a range of free apps using my own apple id. After this I logged out of the apple store and gave the ipad back. Ever since this though my friend keeps being asked for my password although she is logged in to the icloud and the store. She is unable to download any apps without being asked to log in as me.
Any ideas on how I can fix this?