After reading how this family has treated you, It angers me. I would not want a family like this in my home if they did that to me.
YOU need to do yourself a favor and term. they don't care about you seeing how rude and disrespectful they have been.
I don't care if they just had a baby, they are selfish and taking their kid issues on you.
You are pregnant, wouldn't you want a more relaxed day without dealing with this trash.