Grey's Anatomy, Season 9

Derek:
[walking into the house, sees Meredith] Oh, hi.

Meredith:
Hi.

Derek:
So... talked to Clemens, he'll refer the tumor patient to someone over at Seattle Pres.

Meredith:
Great. Uh, take a look at the shirt I bought Zola. It... it's... it's in the bag on the counter.

Derek:
Oh, Meredith. Guys don't get all goo-hoo over baby clothes.

Meredith:
Just look!

Derek:
What is this? [He stares at the t-shirt, surprised. Meredith gets up and he shows her the writing on the t-shirt, which says: 'World's best big sister]

Meredith:
It's only 3 weeks, so I shouldn't even be telling you. I mean... I still have a hostile uterus and terrible things are constantly happening to us, which is why I haven't told anyone, I haven't even told Christina, so... if you tell anyone, I... I swear I will kick you out of this house that you built.

Derek:
Don't worry. And good things happen to us. We're gonna have another baby!

Meredith:
We are gonna have another baby!