Dean was sulking. Sam felt a little bad; he and Castiel had been discussing new understandings of maritime law for probably too long, if the closed-off look in Dean's face was anything to go by. This was (sort of) Dean's house and he should make more of an effort to include him. But it was kind of weird – his brother was acting bizarrely possessive of Cas' space. Sam supposed he should be grateful, though, to the man who seemed to have taken in his stray brother. It was a blessing for someone to take care of Dean when Sam couldn't.