The moral thing would be never to marry. It would be perverted and immoral to be the husband of one and not the other, and to have relations with the lower half, which belongs to both. Would a husband kiss the one and not the other. Would the husband of the left girl only touch the left breast? The one girl could just say, "Oh, I'll pretend I'm not here." C'mon... for anyone to entertain the idea is absurd. This is a tragedy (though they have handled it well), and so, because of the strange circumstances, the only right thing to do would be to never think about physical love with a man.