My mother’s will leaves her house to her two kids and two nieces, but she sold her home. Could these nieces come after us for the money?

"She now feels the nieces don’t deserve the money because they never helped or even visited her husband, their uncle."

My mother’s will leaves her house to her two kids and two nieces, but she sold her home. Could these nieces come after us for the money?
"She now feels the nieces don’t deserve the money because they never helped or even visited her husband, their uncle."