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 3 years ago

1. Every Muslim widow is allowed to remarry after the waiting period [iddah wafat] is over. Iddah wafat is 4 months and 10 days during which she has to observe mourning.

2. No one has a right to prevent a widow from remarrying after her Iddah of wafat is over.

3. The rules of custody of children in Islam state that the custody of children after the demise of their father is for the mother and no one can violate her right of custody, unless she remarries  someone else. This means that if she remarried, the custody of the children will be for the paternal grandfather.