I did not need it but I took it anyway.  She offered me two slices of pizza to take home.  I already had dinner planned but I took the pizza and said “thank you”.  I realized that was her way of thanking me for all the things I brought for her apartment.  I let her do it.  It was just the gracious and appropriate thing to do.  Accept her gift.  Whether or not I needed it.  It made no difference.  You need to let people thank you for gifts you bestowed them.  It is the right thing to do.