(((thunderbear)))
I think I understand your unhappiness about not being able to talk with your sister or husband about what happened to you. And what happened to you was horrible.
Your sister may not want to, may not be ready to, talk about the past. That is why she changes the subject. You need to talk about. She needs to not talk about it. That is sad.
It sounds like you do talk to your husband but he is not able to give you the feeling that he truly understands what you feel and what you went through. That's sad too. Keep posting here. I find it helpful, I've found others who do truly understand what I've been through and it does help me sort out and talk about things irl. It helps decide who I should talk to, or should NOT talk to even though I may want to. It helps me know what is safe to say, and what person is safe to say it to. I hope that you experience the same thing here.