Divorce to be filed by husband

My cousin has been facing this issue...got married in Dec 2013...and his wife came to his residence to stay with him in Feb 2014 as the period in between was not good for gruhapravesham of newly wedded...then she stayed with him till may 2014...during this period she conceived and left to her parents house saying she was not feeling well n never came back...meanwhile she gave birth to a baby girl in march 2016..all the way she never came back at the requests of her husbands or in laws over phone...n visits to her place...my cousin bought a new house in may 2015 n she did not even attend gruhapravesam ceremony actually to be performed by her...later he was severely sick because of depression n admitted to hospital where she did not even pay a visit..her demand is that he has to leave his parents n not keep any relation with them...but the thing is that they already have saperate family as he works in a different place..the only thing is that he makes call every day to his parents and visit them once in a month..which she does not want him to do...now he is not interested to carry on this relation any more and wants divorce...he wants the baby girl to be with him and does not want to loose the child....as she is not a working woman he is ready to pay the maintenance also...but the only two things he want is his child n come out of this relationship...pls suggest a possible solution...