Huge babe. First of all CONGRATULATIONS on your pregnancy! Awesome chrissy present for you this year!
I'm so sorry this is happening to you and your family hun. I haven't had a late loss, but i have had 3 mc and i have a close friend who has lost twins (she is on BB) at 24 weeks.
I have sorta been on both sides of the fence with this....When i lost my daughter(at 12 weeks last year) my mum was pregnant too- we were due 10 days apart. I won't lie, it was really hard and i couldn't speak to her for a couple of weeks afterwards....BUT i tried not to make her feel bad because i knew she felt horrible too. I ended up being at the birth of my little sister and i am so glad i was

With my friend i felt horrible telling her, as she struggled with infertility as well as the loss of her babies. I told her i wouldn't shove it in her face, and if she couldn't be around me to just tell me and i wouldn't be offended at all. Although it hurt like hell for her, she got up and hugged me and said congratulations and has been nothing but supportive throughout my whole pregnancy, because she loves me and is my friend.
Now she's pregnant too I'm making her get pg belly photo's done with me lol.

I am sorry for your sisters loss, but it is unfair for you to feel persecuted by your family. You obviously understand that she wouldn't want to know about your pg right now, which is fair enough, but to cut you conpletely out of her life is really harsh. I hope your family wakes up to themselves, and thinks about what they are doing.
From a rational point of view you didn't wake up the morning after your sisters loss and say i think i'll have another baby, because that'll rub it in thier face?
I hope you guys can talk and work things out. Huge hugs, and im sorry if i rambled!

Lots of love xxxx