Immigration affidavit of support part 3 relationship to sponsored immigrant

Relationship to the principal immigrant, not the person sponsoring them (if you are a Joint Sponsor, you need not have any relationship at all - this can be "friend".- but a more frequent situation would be where the primary sponsor is a spouse of the sponsored immigrant and you might be that spouse's parent, so you would write "mother-in-law" or "father-in-law")