claim under sec 125

Husband and wife living separately after case under 498a was filed and at hearing stage.Their 2 year old son is in custody of his father since his birth and being taken care very well jointly with grand parents.Husband and wife are working in bank. Husband ‘s salary is 1.5 times more than his wife and has no liability except himself.Now the father has filed case under sec 125(1)crpc for claiming maintenance for the son from his wife . He has claimed expenses for keeping maid and providing food for child but without any proof of expense. He has sufficient income from bank as salary and thus fully capable to well maintain the child.Whether the case is maintainable in court in the light of above facts and case pending u/s 498a , which was filed before this case.a case under sec 13 is also pending in family court.