Do you have vivid dreams of close relative that passed away?

16 years ago my older sister passed away at 27 years of age. I dream of her every so often and the dreams are quite vivid. I'm always surprised to see her because "gosh, I thought you had died or something". In these dreams, I often wonder where the heck I got that idea from, she's clearly there and in good health laughing and smiling. Of course then I wake up and am immediately overcome by the reality of it all just being a dream.