Recuperating elder doesn’t need a houseguest

DEAR ABBY: My father is in his mid-80s. He has been to the hospital several times in the last month because of age-related medical conditions. A family member is vacationing here and wants to stay at dad’s house for a week instead of a hotel or bed-and-breakfast. Dad told me he’s not feeling up to it, but he doesn’t know how to tell them without upsetting them.