I am filling out the I-864 for my wife. I live with my stepfather, who will sponsor her. Do I need to fill out one I-864 as a petitioner, and he fills out another I-864 as an sponsor? So in total I would submit both I-864 (in conjunction with the other documents, I-130 & G-1145). OR, since I live with him, I only have to fill out one form for him? Thank you and best regards, P.