Lady Vorrutyer Vorkosigan was the first wife of Aral Vorkosigan.
Lady Vorkosigan had a number of affairs, which her husband discovered. In a rage, Aral killed two men in illegal duels, but was not prosecuted for them.
Shortly afterwards, Lady Vorkosigan killed herself by plasma arc. This was not a widely accepted story, with most of the blame being assigned to Aral; though Aral himself speculated that his father Count Piotr Vorkosigan may have had something to do with her death.