There is no easier answer. A United States citizen can petition for a spouse, parent, child or son/daughter. There is no law that allows a Nited States citizen to petition for a grandmother or cousin. You may be able to petition for your cousin if you legally him/her. You may also be able to bring them both here through humanitarian parole but more information is needed.
Answered on Nov 30th, 2015 at 5:15 AM