Lena was clear that she believes she can never trust Supergirl again, citing the fact that Supergirl tried to use Lena’s personal relationship with James against her and arguing that Supergirl just isn’t who she seemed to be.
When Kara tried to protest that Supergirl must have had a good reason, Lena gave her some looks that didn’t just seem like those of a friend venting to another friend.
Lena started chatting about how she and Supergirl aren’t getting along and that it’s never a good idea to meet your idols.
Lena’s expression seemed more like that of somebody who knew a very big secret and was giving Kara the chance to come clean.