Reviewed: - (Review Updated: )
If you want a nasty, horny quickie with straight-up and graphic incestuous sentiments, then this story is it! It has a very low rating - no doubt in very large part due to its dark tone and theme. Many readers will fire in a 'trashing' rating in a knee-jerk response to such taboo and 'unpleasantness' without objectively assessing its quality and psychological validity. Things were not always so here on SOL, and it is a shame - yet another little encroachment on the freedom of speech. That said, there is nothing here in twright's story here to worry anybody legally, it's just that 'receptivity' to this kind of thing is being squeezed out by the PC guardians of public decency.
The rhythm of twright's prose is terse and simple, but perfectly clear. His presentation of the dialogue (within paragraphs even where more than one character is speaking) is not the greatest, but it's perfectly readable. In fact, it could be seen to be a rather effective portrayal of the narrator's voice (a 15yo teenager) - I'm not sure if this is intentional. Either way, it's no justification for the extremely low rating.
The story actually has quite a credible psychological background: the boy's strict religious upbringing, repression of natural sexual needs, a lifestyle totally against the grain of what a boy needs in his formative years. This, coupled with living with a sexually attractive sister 3 years his senior, gives a believable motivation for his violent feelings (boys this age often don't need much help to have those, anyway, especially towards an elder sis!). In his pent-up frustration, he sees an opportunity to assert his power and get what he needs. All the little touches of sadism and sexual fascination are believable.
I'm not sure if it's finished - it works as a finished item, but it is marked 'in progress' - in any case, the story does not stop with the sexual denouement. There is an aftermath to the event, a creative follow-up which provides the true denouement for the boy. It is in essence about power, and sibling love-hate. This is indeed a 'coming of age' story as the author designates - but one with a difference!