Under Muslim law, there are certain relationships that are prohibited.
As a man, you are not allowed to marry certain kinds of relatives:
You cannot marry your mother, grandmother, daughter, granddaughter, sister, niece, great-niece, aunts, or great aunts. You also cannot marry someone who is also related to you through such relatives. For example, you cannot marry your great granddaughter.
Relatives through Marriage
You cannot marry your wife’s mother/grandmother, wife’s daughter/granddaughter, son’s wife in the case of a second, third or fourth marriage.
Relatives through Fosterage
All relations prohibited through blood relations and marriages apply to foster relationship as well. Example, a man cannot marry his foster mother’s daughter.0