Mary and her son in law
I can’t help but in my rewatch of season 12 just gawp at how blatant the framing of Mary as Cas’s mother in law is throughout the whole season…
12x01: Mary’s face… honestly. She is assessing this big time. This is the first meeting, one of our first moments getting to know Mary and they give us this? Yeah, we are supposed to notice her noticing this. This is episode 1, it is setting up for the season, and this is framed as something we are supposed to notice?
*Tink looks into the camera*
The formal introduction:
Followed by Cas’s little step back from Dean and his own assessing moment when he realises who Mary is. He’s such a conscientious boyfriend.
The way Mary and Cas follow Dean’s lead, she asks Dean about Cas when he is interrogating the chauffeur “that’s an Angel?!” so much like the standard trope of “that’s your boyfriend?!”. The awkward discussion over coffee where Mary is looking at Cas very awkwardly and all “a lot’s changed…”
Mary overhears Dean talking to Cas like a married couple, how Dean is asking Cas advice over how to talk to her, she the addresses it like it’s totally fine and they should communicate. Can we get a Hallelujah! Later there is another phone conversation, where Dean and Cas sound like they have a double layer to the conversation, Cas “are we still discussing the same thing?” and Mary sees again how much Dean trusts Cas with finding Sam, he’s left him to do the leg work and they work so well as a team that they found Sam quickly and head out.
This whole scene after all of the Deancas scenes so far this season… it honestly made me wonder if Amara had made Dean and Cas a long term married couple while she was at it.
The whole eye conversation, so #married, followed by Mary’s assessing look at Cas, she noticed this big time, and Cas’s unapologetic look back, like, “he’s so stubborn isn’t he, I can’t argue with him, just play along with me”, a cute bonding moment between them…
12x09: Cas is a MESS. Mary initially is angry because she’s worried (nice reminder of Dean), she lashes out at Cas but then when they meet up again SHE is comforting HIM, while he plays the role of the worried husband who is counting the hours, unable to cope… she tells him they’ll get them back, they can work together… she is so supportive of him, it made me ache.
Then later a still emotionally wrecked Cas declares that he would do anything to save the Winchesters, that they mean everything to him, while looking 80% of the time at Dean and Mary immediately looks at DEAN.
In 12x12 we have Cas nearly dying, due to MARY’s actions, the whole love declarations debacle…where AGAIN Mary looks straight at DEAN.
Mary then canonically counts Cas as FAMILY.
In 12x14 we have the reverse of Mary being angry with Cas because of worry for Dean, with Dean lashing out at Mary for putting Cas in danger:
Dean angrily kicks Mary out. Of course it’s not just Cas, but this is the first thing he went to. Sam focused on Wally dying, Dean on Cas almost dying, for *reasons*, if we noticed this, Mary noticed it too and she knew before it even happened judging by the way she told them in the first place and her response to their reactions, she was not surprised.
We then have a long slog without much interaction between any of them, culminating in 12x22 and 12x23:
After escaping her brainwashing Mary looks directly at Dean when asking if Castiel will go along with their plan. I mean, this is something basically everyone does, speak to Cas about Dean and Dean about Cas. It’s a standard couple trope, no-one ever asks Sam about Cas do they? There’s a reason for that.
When they enter the cabin Cas’s immediate “DEAN!” and completely ignoring Mary and Sam…see Sam’s look of ‘am I even here?!” and Mary’s look of “same old, I’m not surpised”.
So, basically, every interaction Mary has had with Cas has been framed as a mother in law dynamic and meanwhile many of her interactions with Dean himself have had references to Cas as his romantic partner too.
Honestly I would be so surprised if she didn’t just assume they were a thing and for this to be one of the many Destiel exposition points when she comes back in season 13…