please help!!!

So my husband and I are having a few set backs and we are living with his parents for the time til we get things fixed. I'm pregnant with our first child and now his mother has completely flipped. We were getting along great and then boom all of a sudden she starts ignoring me and blocked me on Facebook. How do I handle this situation since we are all living together right now.? Also not to mention when my husbands sister comes around with her two kids it's like they are all that matters.