Agree. I'm not sold on this idea either, but will go one step further.
I honestly don't think L&P has any intention of letting Aiden fuck Sophia. If he did, a critical line would be crossed. The tormenter technically becomes lover, and the tension lost.
It's ok for Aiden to tweak Sophia's teat while in disguise, and we might see other stuff, but Aiden is too smart. His intension all along has been for the better equipped Andre' to do the dirty work while he continues to be the arch villain, humiliator, boss.
Sophia will adore him for this, but never be aroused by him.