'Sibling' - she notes Miles not using the term sister. It might just be a turn of phrase, but if it isn't, that is very interesting. She likes him immediately. Good job, Vorkosigans, you seem to have raised a son that is Not An Asshole. If only more Vor families could say the same.

"Well!" she says, her smile broadening a little. "Excellent job, Yvette, exemplary example of sisterhood, he will never know my terrible character flaws now."