Yes, I would, because deep down, no matter how awesome the realisation of the fantasy is, she is cheating. If it were two random girls pashing, then I'd be loving it.
It would only be cheating if she's doing it without your permission behind your back actually.
"All you lords and ladies, still think that the only thing that matters is gold.
Well this (torturing people) makes me happier than all your gold ever could!
And that makes me happier than all her sapphires,
so go buy yourself a golden hand, and FUCK yourself with it!"