[Chris]

I thought this was a pretty interesting topic - so I decided to get some statistics on it:

The most commonly reported form of abusive sibling incest is abuse of a younger sibling by an older sibling. A 2006 study showed a large portion of adults who experienced sibling incest abuse have distorted or disturbed beliefs (such as that the act was "normal") both about their own experience and the subject of sexual abuse in general.

Sibling abusive incest is most prevalent in families where one or both parents are often absent or emotionally unavailable, with the abusive siblings using incest as a way to assert their power over a weaker sibling. Absence of the father in particular has been found to be a significant element of most cases of sexual abuse of female children by a brother. The damaging effects on both childhood development and adult symptoms resulting from brother–sister sexual abuse are similar to the effects of father–daughter, including substance abuse, depression, suicidally, and eating disorders.

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It is estimated that approximately 15% of all people report some kind of sexual activity with a sibling in childhood. More specifically, studies have shown that between 2% (Leader, 1991) and 4% (Finkelhor, 1999) of people have been sexually victimized by a sibling as the sexual contact involved some degree of forced or coercive activity.
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So yes, there still is decent amount of incest going on - and I know several people who have been through situations like that. We may not always hear about it but the unfortunate problem is there.


Best wishes,
Chris