Husband torturing for sex, please advise what can be done ?

I cousine got married 6months ago. Her husband is govt employee she put a condition on sex that she don't want children yet, first he agreed for that but present he is harassing her for sex and punishing her mentally(daily torcher) and physically (twice till).sometimes he said I want sex, for that only I got marry you. I will see your end to whom you want to complain do that I don't care anybody like that he is saying. What he said before marriage is total wrongs his family background also not good his brothers wife went away from home after 11years. She complained to her parents but no use because present his husband saying that before marriage I said everything to her she only changing her words, I don't want her anymore I will return your dowry like that he is saying at her parents and called to my cousine and said you don't know anything about life I will show you how it is come back to our home like that. when she called him he didn't attempting the call. Thanking you sir/mam