I get ya. So pussy on pussy, mouth on pussy, that is incest for women. Kissing, squeezing tits, shoving some dudes dick into your sisters vagina is completely acceptable.

It is good that guidelines are established. Thank god for those pioneering whores. Although, I think there are actually twin sisters that have done worse. I seem to recall a set of twins doing alot of piss stuff. Can't recall their names, though.