“It is well-established in caselaw that a child may have more than one payor parent if a non-biological parent stood in loco parentis (See Chartier v. Chartier, 1999 CanLII 707 (SCC), [1999] 1 S.C.R. 242; see also Wright v. Zaver, 2002 CanLII 41409 (ON CA), 59 OR (3d) 26 [2002] (ONCA)).”