Lady Parthia appeared much more optimistic about the future of Galiosos Island than Alexander, thinking they had already passed the hard part.
So with regards to Alexander's worry about finding a good candidate to look after the place, she did not think it should be too hard.
Alexander however had seen how the various forces interacted with each other up close and thought otherwise.
'There is no way the sisters are going to play ball. Linda is too vindictive. And even if … by some miracle that happened, there is still the Heeat family. And I don't even want to think about Metztil!'
From what he had seen, the younger lady would never be satisfied with just taking half of her share. She would always be afraid of her more legitimate elder sister taking her portion back and kicking her out.
Also from what Lord Kite had said to Alexander regarding Lord Parker's death, it was very unlikely the Heeat family would simply let Lady Miranda and he be.