Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 5 months ago

Daughter of your half brother is a real niece for you and she is a Mahram for you like your daughter. Your half brother's mother is your father's wife, who is also a Mahram for you like your real mother.