Blindfold suprise

We often roll play this type of scenario. After wife gets out of the shower I have lingerie picked out for her waiting on the floor with a blindfold on top. I let her know I scheduled her a massage at the local spa and let her know that her usual woman masseuse is on vacation and a male masseuse will be filling in.
The blindfold helps her imagine being rubbed down by another man and I think it's the hottest thing ever
 
My wife has a fantasy where ahe is blindfolded.naked in a room full of strangers. They.grope, kiss, fondle and finger her and she has no idea.who is touching her or how far it will go.

We have roleplayed it several times, but so far I have not been able to persuade her to do it for real...
I did that with a sub. There were about 20 people at the party. She had no idea which 4, including a woman, had used her