My brother wants to stay at my place for a weekend, but he’s insisting on bringing his dog. I have a strict no-pets policy in my apartment and have explained this to him. He says it’s unreasonable since the dog is well-behaved, but I’m allergic to pet dander and don’t want the risk of getting sick. He’s now upset, saying I’m being too controlling and not understanding. AITA for sticking to my no-pet rule?