DEAR MITHUN,
Neither there are any svere allegation against each other nor there is a big issue in between both of you.
You both are living separatly from the Joint family, so there is involvment of in-laws/elerd objectionable to her.
So keep cool for some time, don't rais any objections, demand on her, don't discuss with her about property and money matters, she herself shall be set right after some time.
With concerned to your query regarding Maintenance, rightly replied by Mr Prakash.
See how yourself you are contradicts
at first, you are saying that, you are not interested sharing a single paisa to her and to her daughter
at the other place you are saying like, " She will not allow my daughter to see my parents and her grand parents love to my daughter ,never come to their place "
So, if you are not ready to pay a single paisa, but they ( Your wife & daughter) are having full right and authority to claime maintenance from you, and on your non payment you will send to Jail.