Probably. Bella and Renesmee did 加入 the family at the same time, so it would kind of make sense to call them sisters. But I always thought that they'd say Edward and Renesmee were twins; they look exactly alike so that would fit too :)
wow! good Q! never thought of that!! well i guess they wld pretend 2 b sisters 或者 well i don't think since she wld be with jake, and jake has apack, well i don't think that the pack is going 2 移动 around with the vamps, and besides renesmee isn't full vampire so she cld live with jake and visit the cullens now and then! anyway thats just what i think!