Please any advice will help

As of today im 17 weeks pregnant after 2 mc in 2015.

I have been with my husband for 10 yrs he has 1 brother and 3 sisters. I have been over backwards to help his family out and no matter what i do his younger sister is always making my life a living hell... i unfriended her on facebook, only see her at family and its still not enough... she talkes shit about certain family members and then tells them it me all the friggen time. She doesnt like to see me in peace... and my husband is so blind that he says me and my brother and sister are a union.

Not matter what she does he is a family man and he puts me down for his family..

The more i try to stay way nothing seems to work and everyone always stays on her side and then i am the b####. 😢😠😠😠😡😡😡😡