Amelia genuinely loves Owen, and she wants to be with Owen, Scorsone tells EW.

She just gets terrified.

What happens involves Merediths (Ellen Pompeo) feelings about her sister-in-law marrying her best friends ex-husband.

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Credit: Byron Cohen/ABC

Meredith and her have a huge blowout on the wedding day, McKidd says.

It gives Amelia an existential moment of, Is this the right thing?

Is this even the city I should be in?

Is this the life I should be living?

Bad moment to have an existential moment, but thats what happens.

That sends her into a tailspin.

She doesnt understand, and she feels really betrayed and thrown under the bus.

But the story line will provide some great comedic moments during the season-ender.

The finale is extremely emotional, the actress says.

Its the culmination of a lot of emotional arcs that have been building Callie-Arizona, April-Jackson, plus Amelia-Owen.

Thats exactly what happens.

Its very, very emotional.

Theres something for everybody across the board.

For Alex [Justin Chambers] and Jo, Alex wants to know why it is a no.

And he confronts her about why it is a no.

Its a good finale.

I wouldnt say its over-the-top like the shooter episode, but I think its classicGreys.

I think viewers will be very happy.

TheGreys Anatomyfinale airs Thursday at 8 p.m.

Check back after for scoop on season 13!