grandma (MIL) sometimes has our 3 nearly 4 year old overnight. She lives alone and puts him on cushions on the floor (there is nowhere else) and sleeps beside him. He has wet the bed on a couple of occasions, and one time rolled off and peed on her white rugs. She works from home, so I understand the difficulty there, plus the rugs are heavy and she cant manage the laundry. She is insistent that we put him in nappies when he sleeps over. He hasn;t work them for nearly 2 years, and doubt he will keep them on. I don't want to do it as it seems regressive, especially as although he kept dry at night for 3 months, he has been wetting the bed quite a lot at home recently. Am I being unreasonable?