Or maybe that should be soft spot. Or maybe it shouldn't be either, because Matilda of Flanders does not come across as being particularly weak or soft. Women of her status weren't expected to be - they were educated to be fully capable of administering their husband's domains while hubby was off doing other things, like rapaciously grabbing another man's crown... In Matilda's case, this meant that while William set out to claim that English crown, she was kept busy managing his duchy. And their children.
Read more about Matilda here!