first we deal with the law
http://en.wikipedia.org/wiki/Cousin_marriage_law_in_the_United_States_by_state
WIKI SAYS:
In all states, close blood-relatives that fall under the incest statutes include:
Father
Mother
Grandfather
Grandmother
Brother
Sister
Aunt
Uncle
Niece
Nephew
In some states, sex between first cousins is prohibited. The cousin marriage law in the United States by state article has a table( see above link) which shows that cousin sex as well as cousin marriage is outlawed in some states.
Rhode Island allows uncles to marry their nieces if they are part of a community, such as orthodox Jews, for whom such marriages are permitted. Many states also apply incest laws to non-blood relations, including stepparents, step-siblings, and in-laws
If she looks like this an wasn't my mother or my sister I would not care if we were related or not--
http://acidcow.com/pics/20100113/the_most_beautiful_woman_in_the_world_09.jpg