I’m really sorry to read this, OP. You are definitely not an R-word because you stutter and I’m very sorry your sibling, someone who should be protecting you, not attacking you, has said that to you and is making things difficult. I’d much rather have a stutter than be nasty like your sibling is to you. You deserve better than this and I really hope you get it I wish you the best with everything. Lots of love and support, OP