Thread:Nerdfightergirl/@comment-4287993-20140707091656/@comment-4287993-20140707130841

Lexie and Meredith both referred to each other as sisters. Besides, half-sisters are different than what we're discussing here: adopted characters in relation to their biological families. They are biologically related and have a sibing relationship. We draw the line after evaluating the kind of relationship or the role in each other's lives they have.