maintenance

Hi Ld experts, I would like to know the legal standpoint for the below marriage issues: Both husband and wife are divorcee and remarried. Wife has a girl daughter born out of first Wed lock, court has granted custody rights. Second marriage done 11 months back, now again the husband and wife are going through the rough patch due to misunderstanding and has filed a maintenance case U/S CRPC 125. Wife is working in corporate earning 40k month, she has claimed maintenance for herself and daughter. In the above scenario would the second husband responsible for maintenance of the daughter? As she was born out of the wedlock of first marriage, what defensive options we have to take care of the situation.