Ah surviving the in-laws!! Or even your own family. The saying "you can never go home" is true. It's hard. Of course I'm obligated to give you the "be thankful they are letting you stay there" comment and "it's their house, etc" regarding the heat. There....that's done. Because honest to God it is hard. There is nothing worse than someone offering to help you on conditions that they set. Mitch Albom (author) has often said if you are going to give money to the homeless beggar on the street, you have to give it with no conditions (such as--I would give him money but he'll just spend it on booze). Give the money because you want to help and not because you want to control what they do with it. This relates to any help we give. It's hard to do and I'm sure his folks haven't learned that yet. "It's my house, I get to say what the temperature is." With no concern that you may be uncomfortable. Unfortunately, for the time being you may have to put on three sweatshirts and four pair of socks and learn to crochet so you can make an afghan; learn to fall asleep sitting up so you can sleep with others still up and learn yoga to help calm your nerves!! Maybe when you're ready to go to sleep you can gently and politely say, "Guys, do you mind if I lay down? It's been a really long day." I empathize so much with! I had to live with my folks and my two little girls years ago and it was horrible, though I was grateful for the place to stay. Sit cross-legged, extend you arms, touch your middle finger to your thumbs and say "oooohhhmmm....ooohhhmm..."