lol hahahaha anakin is only half a dude, lol
and it'd still be incest if she got it on with bail organa, and i don't even remember him in episodes 1, 2, and 3....
but nonetheless, she never engages in sexual activity with anyone in the movies, and it's only implied through her having children in the Thrawn Trilogy and Dark Empire trilogy that she engages in sexual activity with Han Solo (unless of course she's somehow related to Shmi, and they're just freaky and concieve from being exposed to slavery and extreme amounts of sand (who knows))
so nonetehless, she kissed luke not out ouf "ZOMG MARK HAMIL SO HAWT" but out of "ZOMG LETS MAKE HAN SOLO SO MAD" so can that kiss actually be called incest?