She married a USA citizen. Had and still has a green card.   They were married for 14 years, and had a little girl.  The little girl is a dual citizen.  She left her husband and she and her daughter moved back up to Canada in August.   I never knew she was from Canada and not a US citizen... even though she states now that she is a permanent resident of USA but a Canadian Citizen.   I have been filing their taxes for a few years now as married filing joint, with a child, living and working in NYS.. At the same jobs, year after year.