As the biological parent your rights are superior to a grandparent's but if he has had them for a period of time he could try to fight you getting them in court by claiming what is known as "loco parentis" which is a Latin term for one that stands in the place of the parent and has established a parental relationship. As their father you should hire an attorney and file a petition for paternity and visitation in the court, as a witness in your favor you would want to call the social worker and others that can attest to your parenting and relationship with your children. The children's young age is in your favor in that they could not have a long established relationship with your father as their primary caregiver, but you will want to be able to show you have the ability to care for them with suitable housing, employment, and extended family support that can help. Whatever guardianship the mother gave to your father is not really enforceable, the proper way is to have guardianship done through the court as an order, but even then before that would be granted you would have the right to contest.
Answered on Feb 09th, 2012 at 10:39 AM