Divorce from Wife

My friend got married in 2015. As my friend is NRI they settled outside India. After 1 year they came back to India with baby & girl requested to be With her parents for some time. When after 2 months my friend came back India to take wife & kid back the girl refused to go with my friend. She & her family cleverly planned everything & made false allegation on my friend. One of the intentions of The girl & her family was to seperate boy from his family. After that incident my friend told many things about the girl that how she used to harras him from last 1 year. Now after 1 year girl is living with her parents & boy is outside India living alone. Now girl wanted to go back & live with him as her planned failed. But now my friend not willing to take her back as he doesn't like her as she will create problem again if she goes back & neither my friend family wanted girl to go back with her husband as the girl is very bad. after 1 year of living seperately girls family not visited boy's family . Girl & her family only approaching boy by messages & over phone to take girl along with her. My friend wants divorce from her ! Please suggest action & case to be taken up.