I've recently had my step son (15) to stay for a week. For the two nights before he arrived we had his grandparents staying in the same room. The day they swapped over I changed the bed sheet and pillow cases but not the duvet cover. At the time I was so busy worrying about cooking for everyone etc I didn't really think about it, but now everyone has gone I'm worried that maybe that was a bit off. Was that really bad hosting? Or was it fine just to freshen the bed a bit as they're his grandparents?