Meredith reveals who Callie’s new girlfriend is and it does not go well.
As we all found out last week, Callies new girlfriend is the woman partly responsible for Dereks death.
She and Meredith both realize this as soon as they lock eyes, but everyone else is completely clueless.

Credit: Mitchell Haaseth/ABC
And Meredith, for one, wants to keep it that way.
Despite his attempts to get some information, Mer insists shes just fine.
Meanwhile, Meredith is literally sitting in the corner looking impossibly emo.
Do they think this is just normal for Meredith?
Meredith finally exits the bathroom and returns downstairs, where Penny kind of ambushes her.
So she does just that, wooing Arizona and, unfortunately, Amelia.
Funny joke,Greys!
Its not a joke, though.
Arent dinner parties so fun?
At this point, it feels like Jerry Springer is about to hop out at any moment.
NEXT: Meredith blows up at Amelia
Meredith goes up to a bedroom, where Amelia soon joins her.
How would Mer have even brought it up?
Oh, hey, Amelia, Callies new girl?
Yeah, she killed your brother.
What a world, right?
She has to be there for her dead husbands three kids.
Its the angriest Ive seen Meredith in a while, and maybe ever.
So angry that she screams, Get her out of here before I kill her.
Its a dark story, so Amelia, of course, eats it right up.
Callie tries to butt in, but Meredith responds by shutting the door on her.
The rest of the night it just needs to be her and that bottle of tequila.
And Alex but mostly that bottle of tequila.
Outside, Callies confronting Penny about never telling her about her connection to Derek.
But she didnt know him; she didnt love him.
She doesnt wake up every morning longing for his mere existence.
She just has guilt.
Lots and lots and lots of guilt.
Then Meredith surprises her and everyone else watching by saying, Ill see you Monday.
Sure about that, Mer?
Karev helped with that: His unwavering concern for Meredith was one of the best things about the hour.
Thats a good friend.
And friendship is at the core of every greatGreysepisode.
Couples break up; friends like Meredith and Cristina dont (usually).
Meredith (and Cristina) would probably agree.