Well done, you are really fortunate.
I have gone from a 42D to 36D. The main reason for the D cup remaining is so that it can hold the loose saggy skin that is my breast tissue! I feel like a far side granny with my knee knockers! Lol
I've considering a lift, if I am able to maintain my weight loss for the next 2 years. - I've started to save the money each month.