Not too much of a surprise, considering, but I loved the way you pulled it off. I've really been enjoying the take off of Brother Z from your other story, but I do wonder... isn't a 20 year age gap a tad bit squicky? I guess if the age difference is only about 1/10 the expected age span, it can be considered insignificant, but there are 20 years worth of growing up and various life experiences for the girls to reconcile with. Seems rather... licentious, to me.