seek legal consult with a lawyer usually pag advice naman mga 1k ang fee or ask DSWD regarding this matter. Sa cityhall may DSWD office yan sila doon. Yung Mother and your dad kasi are conaideres common law partners. I am not sure but next kin to look after sa bata is the direct relative nun monther which is si Tita. Better pa rin seek legal advice first. At saka if ang paalam sa inyo is hiram at hindi binabalik Kidnapping yan dapat kasi malinaw na procedure dapat gawin