I am really sorry about your dad. may I ask what is HPD?

I would hope if one of my parents (if they had still been together) would have gone on and found someone else. No one can ever replace a parent but our parents and even us need companionship once one has passed. I certainly would not want a parent to be lonely. of course I don't know your story really so I can't judge the issue. I wish you all the best.