Dean and Sam. Hunters of the supernatural. They walked inside Madisons house since they had reason to believe her ex boyfriend was the werewolf.

Dean and Sam walked inside her house posing as Fbi agents investigating a murder.

Sam, "Madison just to be sure we're gonna stay here for a while and make sure he doesn't make moves on you."

Dean, "Yeah as Agents it's our duty to keep you and your brother safe."