Her behavior during her marriage to the Duke has been described by both Marion Meade and Alison Weir as schizophrenic, with Weir adding a suggestion of manic depression.
Tingkah lakunya selama pernikahannya dengan Adipati dicatat baik di dalam Marion Meade dan Alison Weir sebagai Skizofrenia, dengan Weir menambah sebuah sugesti maniak depresi.