We are more alike than you think

Supergirl can't stand the idea of losing lena, not after everything they have been through, maybe after a quick visit to L-corp's balcony Kara gets to explain why she reacted the way she did. This is going to be based on season's 3 episode 18, but instead of that shitty apologize we received at the lab, lena gets an explanation on supergirl's worries when it comes to kryptonite. It may get mixed up with episode 19.

First time writing an Au, at least in here. English is not my first language so im going to apologize beforehand. Im deeply trying to understand each others point of view in this story, I want to show both lena's and kara's point of view as to what it should have happened on the 3rd season. Again, I apologize if this ends up being either boring or unreadable.