As Kara kneels before her neck bent in submission Lena is amazed at how they had gotten here. After the clusterfuck that was the last few weeks they had been enjoying just being able to be alone together.
Ever since it had been revealed that Kara was Supergirl the violent crime in National City had dropped significantly and Kara was more than happy enough to let the cops deal with the small things like car theft. Whenever she did arrive on the scene it was usually over in moments without a shot fired, the warning of the city's Underworld leaders still clear in many a criminals mind. Kara and by extension Supergirl was off limits. And so Lena and Kara had been having plenty of time to themselves Kara being forced to give up her job at CatCo after the reveal taking on a position as Vice President of Sunshine Enterprises alongside Lena.
But how they went from that to this still boggles Lena's mind.
She had always known there was something Kara was hiding, but her being a submissive was not what Lena was expecting. It would be a lie to say that Lena didn't find it intoxicating, having Kara kneel beside her, having her be completely under Lena's control, trusting her completely with everything she was. It seemed that between the stresses of being Supergirl and now being Lena's VP Kara had reached the point where she desperately needed the outlet. And so she had approached Lena, she had cooked a nice meal for them, waited until they had finished and were snuggled on the couch and then broached the subject.
To Kara's evident pleasure Lena had been more than happy, she understood more than most the stresses in the life they lead, of always having to be in control. She knows that Kara must trust her implicitly and without question to ask this of her, when she does she swears her heart swells with even more love for the blonde. And that is how they had ended here. Kara waiting for Lena to grant her desire, to place the collar upon Kara's neck a symbol of Lena's love and Devotion, a small piece of Lena that would allow Kara to just fall away from the stresses of the real world for a few hours at a time and just be.
They soon work out a system, Kara and Lena both taking solace in what the other offers them. This goes on for months and for the first time years Kara feels whole, she has a loving wife, willing to do anything for her, she has friends and family who love and support her and she has a city, who she knows loves and supports her.
Even if Alex did run screaming from the room when she walked in on one of Kara and Lena's scenes