Unfortunately, adults who live together but are not married are not eligible to receive payments on the basis of disabled person with whom he or she lives. But see the section on common-law marriage!
Benefits for U.S. Citizens Living Abroad
Generally speaking U.S. citizens who are living abroad are eligible to continue receiving their disability payments unless you are living in a certain countries such as North Korea.
If you intend to be outside the United States for six consecutive months or more, you should use the Payments Outside the United States screening tool, which can be found on the SSA’s website.
For more information you should read: Your Payments While You Are Outside the United States and the information on the International Programs and Resources website, both of which can be found through the SSA website.