Pretty much a phone app only type of gamer. We did play the Sims way back in the day on PS2 I think.
I'm not sure what you mean by buttons, unless you're just saying instinctively know something like WASD without looking. But that shouldn't take but 10 minutes to get comfortable with.
That's why I want something co-op though, so she's not just getting her ass kicked and getting frustrated. I'm a pretty patient gamer (I have a RL friend who is generally really slow about any game; we spent like 15-20 minutes blowing up tires and concrete blocks before every mission in The Division waiting for him to be ready). Of all those games listed, I feel like everything except Borderlands 2 would be pretty casual friendly (and Borderlands 2 is the only one I've played). I'm also throwing the MMO idea around just because they all seem to hand-hold a ton at the beginning. Plus, there are a shit load that are F2P.
My experience as a patient gamer and loving husband, below is where things fell apart at various times into the play time:
Portal: WASD while mouse looking and remembering to left click vs right click or vice versa. Playing portal 2 without prior experience with first person shooters or thinking with portals for that matter is rough for the casual gamer.
Trine: Any of the parts that require precise jumping or timing lead to frustration or me just pulling her along using the waypoints.
Borderlands: Aiming/moving/shooting staying alive, inventory management.
Castle Crashers and the like: Would loose where she was often enough it killed her.
Magicka: Failed big time as it is very nuanced to cast the correct spells, was hilarious but we got nothing done.
Lego Games: An of the bits that required precise jumping or powers to climb areas then jump under a time constraint.
Diablo 3: Inventory management, screen sharing would become an issue sometimes but that was me pushing along too fast.
MMOs:
Everquest-Dying in the commons at level 4 with no idea where.
World of Warcraft-circa 2005, did good up to level 25 or so but became more of a babysitting job then fun, same with Guild Wars 2.
Haven't tried survival games yet, might be something to try, I suggest ARK if you have the PC power for it.
Most fun we had was various twin stick shooters, fighting games, and watching each other play Skyrim or Fallout 4, but best time together is again the telltale or single player horror games.
Try them and I hope you have better luck, but she would have to be less casual then you make out.
Oh if you both like racing games Track Mania is where it is at.