While the question in {insert US state here} is "if a couple in {state} get divorced, are they still brother and sister?" the question there might be "how many women does a man have to divorce to not be his own grand paw anymore?"
---- Watch this space: Catch-22 quote will appear once I have the book in front of me.
(And BTW - never heard of there being any epidemic of h\ufffdmophilia in them there parts - did you? No downside then ;-)
Now re marryin' yer sister: assures a nearby, ready supply of spare parts like kidneys. This should appeal to those MBAs engaged in the M$-style of bizness, now pretty Popular among Murican auto-cannibals - donchaknow?