They made their own choice. They chose family.

Sam straightens up, frowning at that. Then cursing himself soundly in his own head. "I'd completely forgotten it was that time of year again." To be fair, when it had first happened, he'd been more out of it than normal. The days had all blurred together a bit. "That...actually explains a lot of his actions last night. He was doing a lot of pushing, a lot of wanting to be..." He trailed off because...yeah, not really a thing he ever talks about with Dean. Sure, Dean doesn't really mind their relationship, but he doesn't get it and he really wouldn't get the punishment stuff.