basically, on the above-provided information, it seems that your wife has filed 125 CrPC to avail for maintenance. but in this case, it won't be possible for her to avail that as 125(4) CrPC says that no allowance shall be given by the husband if the wife is living in adultery, or goes not have strong and sufficient reasons to prove this. As your wife is living in adultery she won't be able to avail of any such maintenance.
Moreover, according to article 21 A, any minor child between the age group, 6-14 yrs, has the fundamental right to education. So you may use that additional point to prove that your wife is depriving her son of the basic fundamental right is entitled to.
But the only issue you will face will be the custody issue, as if the child is 5 years or less, the custody shall be with the mother. But you may use article 37a which says no child shall be exposed to any torture, or else wait until he completes 5 years for the custody issue, which will be evaluated and addressed by the Court.