They said they are not letting it happen I don't know what else to do
I would tell them that you two are married and every couple fights. You would not ask your parents to come stay and say "oh sorry dad mom only." I would also bring up that your sister and her bf are living there and they are NOT married and that y'all are together forever til death do you part and they are going to have to learn to be OK with that. But in the most respectful way possible. I hope everything works out. Let me know how it goes.
I don't understand that either l guess its because of the past fights we had but what couple hasn't my sister and her boyfriend live here I know my parents wouldn't of wanted to be separated if they were in our shoes and this is our second child together so how would you go about it to them
Why can't you be with him? Y'all are MARRIED you are pregnant with HIS child.