A stepparent who acts in loco parentis is bound to provide, maintain, and support the stepparent's stepchild during the residence of the child with the stepparent if the legal parents desert the child or are unable to support the child, thereby reducing the child to destitute and necessitous circumstances.
HRS § 577-4
Legal duty to support includes reasonably necessary and available medical services. 8 H. App. 506, 810 P.2d 672.