Can't sign into my apple ID to update apps
I am trying to update my apps from the app store but it seems as if my mothers email address is in the box after I click download when it says sign into your apple ID. It is ghosted (meaning I can't change it) but I am signed in on the app store under my Apple ID. This does not make sense why her email address is in there and mine is not. Now I can't update my apps becuase I can't put my apple ID in there. Please help me. Thanks.
MacBook Pro, OS X Mavericks (10.9.2)