I have a simple one.
I want two women. Both sexual adventurous, both consenting to me setting up games for us to play, both open to me seeing someone else (to avoid jealousy when revealed to each other), and MOST IMPORTANTLY for this fantasy?
Both exclusively straight.
I want them to have never even entertained, in any way, the idea of being with other women. I want them to be as exclusively straight as I am.
I would set up two sybians, very close to each other, facing each other.
Nude, but for a blindfold, a binding keeping arms behind their backs, and ear plugs, I would lead them in, one at a time, and seat them on the sybian, before attaching custom bindings on the side of the unit to their legs, so they are utterly unable to remove themselves from the stimulation.
I would control the sybian and bring them each to a mild orgasm, before setting the machines on low. At that point, their arms will be unbound, and they are to remove their ear plugs, and then blindfolds, only to be exposed to the fact that another woman is there!
They will be close enough, and have enough movement to lean forward, that they can lay on each other in support, touch each other with their hands, or even kiss.
The machines will be turned back up, before being left on, on high. Utterly exposed to each other and knowing the other is seeing them in such a state of stimulation, arousal, and forced orgasms, seeing the other in such a state, and with the slow destruction of inhibitions as time passes and they cum over and over, I would watch as they go from trying to ignore the other, to leaning on the other for support, to holding hands. to kissing and groping, as hour after hour of forced orgasms on the sybian tear down their supposed heterosexuality.
And I just want to watch as time and unbearable sexual pleasure turns my two lovers into the bisexual women they should be.