I would like to get opinions on a prom dress issue and know that the posters here on DIS will tell me what they think is the right thing to do. At my daughter's high school you go to prom as a junior and a senior. She is a senior this year and last year I bought her a very expensive ($450) Nicole Miller gown to wear to prom. It is a very beautiful silk/foil print gown. Part of my reasoning in spending so much was that she and her older sister can also wear it to sorority formals in college. The issue at hand is that two of my daughter's classmates have asked to borrow the dress to wear to this years prom. My first response was no. These girls are not as tall as my daughter and I am afraid that the fabric will be damaged if they walk on it and I don't want it to be hemmed. My daughter thinks that it is rude to just say no but I think these girls are taking advantage by even asking. The first girl who asked was an easy no because she isn't even friendly or even nice to my daughter. The second girl is a friend so that is a little harder to say no to. Am I being unreasonable? Do girls borrow each others dresses at other schools?