you have married and moved on. but your ex has still not married that it self shows that she loves the child and may be she is struggling so much being away from child to give good education and life to child single handedly(without your support). may be she will come back to india after few years after securing her life and child. is the child not being sent to school??
woman who can keep the child safely in her womb for 9 months will never want to distroy him willingly after he is born unless she mentally not sound.