Wow! That’s so horrible for you and amazing that you made it out! Your sister may have just been too scared to leave the family. If you leave and make a life for yourself maybe she’ll follow later.

this must be one of the hardest times of your life. Andd it sounds like you've had an awful lot of them. I cannot imagine the amount of bravery strength and courage you are showing at this time. It is absolutely awful what is happening to you and so unfair. As someone else said hopefully your sister will follow later but what you guys are doing is very very brave and very terrifying but it is not easy. I found this website I don't know if the resources on that that might help but I am sure there must be organisations in your area but will support someone who has been excommunicated a cult https://culteducation.com/directory-of-cult-recovery-resources.html

Good. Less crazy people to deal with. If your family supports abuse, you're better off without them. And now you're free to start your own family, without it ending up being against your will.