Hm
I can relate to this one although my experience is slightly different
I had never really thought about nappies, but one day tought she would look good in them, so mentioned it, she agread, and the rest is history, we only use them occasionally, and we both enjoy wearing them.
I also work with her dad, but thats not really been a big issue.,
Good luck with telling the one you love about it, all i can say is tell her, if she loves you she will understand.
M