Abusive husband, need suggestions please.

Guys, serious opinion needed.

My pedamma stays in the vicinity of Kukatpally and her husband regularly hits her for no goddamn reason. I've tried to bring this up but got silenced. Neither does she want to complain fearing the recent incidents. Now the problem is that she is still suffering, I did visit once and could see a huge bump on the head. I asked about it and she lied that she fell down the stairs. Please help and provide any suggestions that you can.