You are forbidden to marry your mothers, daughters, sisters, paternal aunts, maternal aunts, nieces, your foster-mothers, your foster-sisters, your mothers-in-law, your step-daughters whom you have brought up and with whose mothers you have had carnal relations. It would not be a sin to marry her if you did not have carnal relations with her mother. You are forbidden to marry the wives of your own sons and to marry two sisters at the same time without any adverse affect to the such relations of the past. God is All-forgiving and All-merciful.