It is essential that a Lawyer be consulted when preparing a Last will and Testament, particularly if you desire someone other than your ex-spouse to be guardian. You should always check with the potential guardian to insure that they want this tremendous responsibility. It is imperative that parents living together agree on the choice of guardian. If one parent names someone from his family and the other someone from hers, a nasty fight is almost inevitable. Although the children's grandparents may be willing to accept responsibility of raising the children, they might lack the health or energy for the job later on.
Most parents look toward their brothers and sisters as potential guardians.
In naming a guardian you should consider naming only one guardian, that is, your sister rather than your sister and her husband. The reason is that joint guardianship can create problems if the couple should separate. If things work out they can always adopt the child. Take time to give thought to a guardian for your children. List the pros and cons of each candidate.