"Would you even let me spank you if your wife were right here watching it?" she says deliberately.
You are worried about Sydney seeing this, but you tell yourself that she can't be behind you; that would be too embarrassing! But a growing feeling of helplessness makes you speed up your stroking.
And you can't look away from Faye... You can't help looking at her lips, and the wonderful tit you can see, and glancing down at her ass. You feel compelled to nod your agreement.