Taking money from family members? That's not nice...
As Jack Strauss was reputed to say: "I'd bust my own grandmother if she played poker with me."
My own grandmother, gone these many long years, would be nothing less than p$%ed off at me if she ever thought I slow-played her, whether at stud, gin or scrabble.
As far as razz goes, I'm in the same situation as Holmes... I think it's a great game, but no one in my group wants to give it a go.