Austin just turned a year old and is not neutered (we will be breeding him in the next couple of months hopefully). He potty trained pretty easily (about a month after he was home) and when he was 6 or 7 months old we installed a doggy door. My fiancee and I live in a 3 bedroom house, with one bedroom being ours, one room being an office and the third room being a guest room/my room where I keep all my STUFF. So for the last 3 months he has NEVER had an accident inside the house EXCEPT he marks his territory in MY room when I am in there. He doesn't do this anywhere else. My fiancee jokes around saying that I am HIS girlfriend or bitch and thats why he pees in my room. Could this be true? And if so, what should I do? We also have another male dog and so I am the only female in the house.