Buddy my beloved cat died from kidney disease on wed at 12 yrs. He has a sister named Beatrice whom always stayed and slept upstairs as Buddys territory was the first floor and my bedroom. They were not the loving sister and brother as my prev cats of 20 yrs were. He often would go upstairs and mark his area, but that was Bud and I accepted it. Meanwhile Beatrice stays upstairs and perhaps runs into the cellar at night but she has not come down into the Living room nor my bedroom. Whether she knows Bud is gone I do not know. My question is how do I get her to come down and sleep with me at night and mingle downstairs??? I'm totally heartbroken and need her with me. Will time and lack of smell help??