Fics like A Fummunity Story: The Perfect Sister.

James hadn't thought about the fact his sister is a Futanari in years, but his fiancé being away for a few months had quickly reminded him of the fact. A faithful night years ago in a shared bath had embedded a memory deep within James that was making a resurgence. The once timid and helpful Vicky had become distant, hiding away in her room seemingly having a personality change but James had been oblivious to this instead focusing on his own interests. Things are beginning to change in the household, will Vicky remain the dutiful little sister or has she got something planned?

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