False Allegations, Maintenance and separation

I am Sohail from Tirupathi, Andhra Pradesh. I am married to a woman from Hyderabad. After 1 year of marriage and a baby girl, my wife's behaviour was changed and we started having big and small arguments. After the delivery, she was not comfortable with having sex because of which we were having long intervals. Because of the frequent Arguments, she along with her mother and sister planned a fake gathering in Hyderabad and went to Hyderabad along with my child. After being there for a week, her mother started raising allegations like I was not having sex with her daughter regularly. She said the sex has to be done frequently. However, me with my parents went there and we settled the issue and brought my wife back. But after 2 months, she is again raising issues that I am having sex regularly and she is not comfortable with that. Because of which they had raised a formal complaint with manila cell and took her daughter to Hyderabad saying she doesn't wants be with me in tirupathi. Now they are making false Allegations. What should be my next step, what are all the maintenance she can claim on me and how can I defend them?