Cristina (Sandra Oh) may be getting ready to leave Grey’s Anatomy, but her character doesn’t know it yet — at least, we don’t think she does. So in the meantime, she’s still totally immersed in her patients at Grey Sloan, and that means that in tonight’s episode (Season 10, Episode 21: “Change of Heart”), Cristina is faced with an impossible choice.

Here’s what’s going on. Remember the family of faulty hearts from last week (Episode 20: “Go It Alone”)? Daughters Ivy and Frankie are fighting for their lives, and they both need heart transplants. One for Frankie is on its way, but her condition is so bad that despite the transplant, she might die anyway.

So their parents have an option: The heart can go to Frankie, or instead, it can go to Ivy, who might have a better chance at putting that heart to good use.

“We can’t choose,” their father says. “You have to do it.”

Regardless of whether or not this is actually something that could happen in a real life hospital, in our hospital, it can, and Cristina’s left to make the choice.

If we know Cristina, we’re gonna guess that heart is going to Ivy. But we could be wrong!

Watch the scene below and tell us what you think: Who will Cristina choose to receive the heart?

Source: YouTube