They let you choose

Lilly moves next to you and say:"Well boy...i'm sorry you will not be submitted by our gorgeous pussy...but i'm in a good mood and in some way i'll let you choose...here i have 4 different envelope with 4 name of our "particular"friends:1 red,1 black,1 blue and 1 green.Now choose one and we will give you to the person written in the envelope."

You gulps,wondering how a womna could be worst than Gertrude,then the Doctor begins to squeeze your testicles and you understand you have to answer.

Yoo say:"i choose the...."