Summary:

Once the truth of Kara Danvers' true identity comes out, along with the scope of her betrayal, Lena finds a kindred spirit in her anger.

Here is the teaser:

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It was the anger that brought them together.

The sheer, unadulterated anger brought forth by one name: Zor-El.

For Reign it was the elder, the father who failed to save Krypton, keeping the planet's imminent destruction to himself believing he was able to save an entire world singlehandedly.

Watching her planet's destruction would fuel Reign for the rest of her Kryptonian lifespan.

For Lena, it was the younger Zor-El, the daughter who kept herself hidden while Lena shared countless secrets over donuts in her office, while also being "visited" by the girl of steel.

The thought that Kara would be so heartless as to take advantage of their supposed friendship allowed Lena to see what Lex meant all those years ago when his relationship with Superman soured.

Neither woman can remember how they came to be at the same bar, sitting next to each other while some woman sang about loss and heartache over the bar's speakers, but they each vividly recall the feeling they had when they discovered their common enemy, Kara Zor-El.

Joy.