Generally courts reject the maintenance claim made by wives of working women category though there is no statutory rule about it.
You can produce the proof of resignation and the reasons for resigning the job i.e., due to your child's welfare and also can convince the court about your financial constraints and his huge income.
Even if your claim is not considered by court, your son can be awarded maintenance and you can prove the income of your husband by which a proportionate sum can be allotted to your son.
You can file a petition under section 125 cr.p.c. seeking maintenance for both.