LAWRENCE V. TEXAS AND CONSENSUAL ADULT INCEST, in a new opinion from the Ohio Supreme Court. Though calling sex between adult steprelatives “incest” seems to stretch the definition a bit. According to Perry Dane, Justice Rehnquist had doubts about this, too, but interestingly most of the comments at Volokh don’t. Plus, interesting observations on tribalism, and the Harvard Law Review’s being ahead of its time.
UPDATE: Further thoughts from Eugene Volokh.