Hi Rose76, so sorry you are going through this… as for the sister that never calls—she is acting within her realm of behavior. She doesn’t call. Sounds like you are not close. She texted—at least she did that…
And like eskielover said, she may not feel comfortable calling. Plus, she may not know what to say…many folks don’t know what to say in this type situation.
I wouldn’t take it personally—you’ve got enough on your plate. And I’m wishing you strength and love.