[She takes the hug from her son and responds with a good mom hug in return, rubbing his back gently as she keeps him close. When he does pull away to make his way towards Bobby, she offers Allison a smile as she moves closer, extending her hand.]

Mary, please. And it's a pleasure to meet you, Allison, but you don't have to thank me. It's not my house, I just stay here sometimes.

[It's Sam and Dean's bunker, and she's not about to take it away from them. But she can also read the context clues and sees Sam being awkward over her shoulder.]

Have you and Sam been ... working together long?

[She knows what she's looking at but she's going to give them the benefit of the doubt and try not to embarrass them too much.]