If it were me, and I 'usually bought sexy lingerie' I would break the norm and not do that this time, before it becomes too predictable....so instead, id go underwear free, or wear just hold ups.
I love rcoreyus' idea of the forbidden affair.
Is your man coming back to your house? Or are you meeting him / picking him up from somewhere?
Wherever you have that initial meeting, make things suggestive and sensual from that moment...for example, if he is coming straight to the house...get yourself 'baby-oiled-up' wearing only your hold ups and leave a trail of erotic polaroids from the front door to the bedroom / lounge / washing machine (or wherever you want the action to begin

)
Make each polaroid more explict as he gets closer to you, for example start with a picture of you fully clothed....finish with one of your thong on the bedroom floor...thats rather mild....use your imagination
Have fun!!!