I really liked the concept and the illustrations. I don't know how much you are going to update the game, but given the theme I would like a pegging situation with one or both sisters, a pregnancy scene, strapon, crossdressing, femdom, or body swapping between Adam and one of the two sisters. Also, it would be great in future scenes to have more variety of outfits such as cosplay, perhaps as a maid, swimsuits or wedding dresses, etc. I'm sorry if I wrote a lot but I really liked it.