Android & Kali Scene
Phew, I'm all for the classics, so both girls riding MC, one on his dick, the other on the tongue. Have them face each other and caress their boobs (if Androids adjustable size is a problem here, I vote for "small", as there are enough ludicrously large hooters around otherwise, love the variety tough, as all boobs are beautiful) and kiss each other. Make it switchable, so each of the girls can enjoy a ride on MCs rebar or enjoy a slippery tonguing down (slurp).
Could also go for impregnation fantasy dirty talk between the girls, though I would maybe consider that in earnest when you are somewhat (say 2-4 updates down the road) ready to implement that.