Dear brother Shabbir, doesn't these ayats only stop people from marrying their mothers, sisters twos threes etc further only. I mean to say, they do not say mothers will keep on being your wifes if you had married them in Jahlia, does it?? How can a person, after knowing that his mother is not allowed to be his wife, keep her in such way... knowing how big the sin is? Shouldn't the status change, even involuntarily, once one thing which has absolutely no place in Deen is known? It is not something that cannot be undone so what else is the tobah for this crime?