What I wanted so badly was for Mary to learn about her boys from Cas. Like that night where Cas finds her when she can’t sleep and she expresses that she just doesn’t know anything about her sons since she missed so much?? All I wanted was for Cas to sit down with her at the table and just start telling her about them. Basic stuff at first: their favorite foods, their sleeping habits, the stuff he’s just observed by being their passenger for years.
And then I want him to say something totally Cas, like “Dean always wears more layers but that’s because his body naturally runs two degrees colder than Sam’s. But that’s normal for him and not indicative of any illness, so it’s nothing to worry about.”
And as they talk, it starts to get a little deeper, and Cas tells her more. He tells her about what she missed, about all the horrible things that happened to her sons and how they coped; how it changed them. And he tells her about Sam, he does, but really it ends up being all about Dean.
He’ll tell her about how Dean clenches his fists when he’s upset, even as he tries to keep his face impassive. About how Dean drums his fingers on the steering wheel when he’s anxious. He’ll tell her about Dean’s nightmares, about the ways he’s chosen to cope. He’ll tell her how to know when to approach Dean and when to give him space, how to gently acknowledge what he’s feeling without pushing him too far.
And with every word he says, Mary’s curious head tilt from when she’d seen them hug in reunion turns into a bone deep type of certainty. Because Cas is telling her things that only someone who paid special attention would notice. He’s telling her things that only someone very, very close to her son’s heart would know.
Cas will tell her the cliff notes of what they’ve been through; will tell her how the whole world looked to Dean and he rose to the occasion over and over again. He’ll tell her about Dean’s doubts in himself and then vehemently declare them as wrong and explain, at length, why. He will tell her about the people Dean has loved— the people who loved him like he was their own— and lost. He will tell her about Bobby, Ellen, Jody, Donna, and Charlie. He’ll tell her about Claire, too, and how Dean stepped up.
And the whole time, Mary will have this realization that oh, she may not have been around to guide and protect her sons, but there was always someone there to care for them and support them when they needed it. She will realize that she and John may have left them, but they were never alone.
But more than that, there was someone there for Dean. Someone picking Dean over and over again while Dean picked Sam, or the world, over himself. There was someone fighting for Dean when he wasn’t fighting for himself. There was someone who saw Dean, and loved him unconditionally.
Sitting across from her, at the asscrack of dawn, filling her in on all the things she missed was every mother’s dream: someone who loved her child with the kind of devotion that would break the world. And from the sounds of the stories she was being told, it did break the world. Someone whose love is entirely untainted and comes without any strings attached.
It’s so clear to her as she listens to Cas talk that Cas loves Dean with no expectations. That loving Dean is something he just does, like he doesn’t know how not to love Dean, like the possibility of not loving him never occurred to Cas. He loves Dean in a way that Mary knows can and will soothe Dean’s sharp edges and battered heart. He loves Dean in the kind of pure way that tells Mary that it will continue to endure and overcome everything without ever diminishing, even the littlest amount.
Mary, through tears, will tell Cas how she always told Dean that there were angels watching over him. And before Cas can make some comment about Dean being the Righteous Man and the interest of most of Heaven, she will place a hand over his and give him a motherly look that will convey all the things she’s not sure how to say— and the things she’s not sure Cas is ready to hear yet. And Cas will flush and look away, mumbling about how her son is very special to him.
And when she pulls him into a hug and murmurs thank yous into his shoulder, she will be comforted in the knowledge that her sons turned out to be wonderful men, and that they managed to stay together through everything. She will be comforted to know that no matter what happens, no matter her shortcomings as she tries to fill a role she never meant to leave, Sam will have Dean and Dean will have Cas.
And this time, when Cas tells her that she belongs here, she will believe him. And she will tell him that he belongs here, too.
And when Dean wakes up a few hours later and wanders in to find Mary and Cas still chatting over the table, he’ll be surprised— but pleased— to find Mary looking more at ease. He’ll be pleased when she gives him a warm hug and pats him on the cheek and tell him with all the sincerity that only a mother can muster that she’s glad that he met Castiel. And when Dean agrees, a little confused, Mary will just smile at him.
“I always said I’d like a third son.” She says, “so give him a reason to take our last name, won’t you?”
And Dean will splutter and turn fifteen shades of red as he steadfastly doesn’t look at Cas but mumbles something that suggests he’s not against the idea at all.
And Mary will laugh again and wink at an equally red Cas before heading towards the kitchen like “Cas said waffles are your favorite, so I hope you’re hungry!”
