I'm I wrong for wanting the same treatment my Fiancee gave guy's in the past

My fiancee and I have been together for 3years now and plan to get married late next year. We started out bestfriends and decided to be more as one can tell. During the whole time I knew her she told me she had ankle problems which prevented her from wearing heels but When we were just friends she told me how she dress all sexy in Heels for this one guy and we been togehter this long and she tells me she does not feel confortable wearing them. Now she has dress sexy for me but never the whole heels outfit thing and I feel that its unfair and somewhat a slap in my face I'm I taking it all wrong?