N.Y. Comp. Codes R. & Regs. tit. 18, § 352.14
(a) The ability of the spouse of a public assistance applicant or recipient or the parent or stepparent of a minor to support such individual must be determined.
(3) If the stepparent of a child receiving assistance is living in the child's home and not applying as a member of the assistance unit, all the earned and unearned income of the stepparent, after applying the following disregards, is considered available to the assistance unit: