what do they put in the air-con?

Caroline was convinced she would sleep well here and she had the best night's sleep since her last visit, up a couple of times in the night, but feeling rested this morning, a lovely blue sky when we opened the blinds. The vampire came at 7 to take her blood, and she was weighed before breakfast. I snuck on afterwards to check my weight; ideally at the end of these 2 weeks she will have gained weight and I will have lost. 1/2 stone swap would be fantastic.