I never share my work with anyone but the teacher or person marking. This is because of two reasons: people want to copy you because they haven't done it and want you to do the legwork for them, so they could easily get the same grade as you - probably due to jealousy of not being able to achieve as much as you or due to laziness. Another reason is because people give you feedback - sometimes they are jealous of you, so may give you "feedback", which may overall make your grade worse, however, if it is from someone higher up, normally they provide constructive feedback, which is good because it helps you improve - you should receive feedback from reality and not society. If I were you, I would just not lend her my work in the first place - it is my work that has gotten me to the place I am and just because she hasn't done it/ wants to "check", it isn't her role to do so, but going forward, be weary of lending people stuff, because you never know what they'll do with it