And her auntie and uncle don't really need that part of the inheritance either.
At the time, he was often with the guard team. His decision to change the will stemmed from the realization that marrying Jane Sampson, he hadn't truly fulfilled the responsibilities of a husband.
As long as he was alive, Jane Sampson would have him to rely on. But if one day, an accident were to claim his life, Jane would lose him as her husband. The Sampton Family wouldn't be a warm haven for her, and James Black knew this even before Jane did. If he were to pass away, they wouldn't show much love to the daughter whose husband had died.
If Granny Sampton and Grandpa Sampton were still alive, she would have their protection. But the elderly do get old and will eventually leave this world before her.
So, James Black thought that his inheritance would become her last resort and support when she reached the hardest step of her life.
