Season 7, Episode 9: "The Sponge"

It's all right, I'm your fiancée. Everyone assumes...

...you'll tell me everything.

-Where did you get that from? -Well, we're a couple. It's understood.

-I never heard of that. -Well, you've never been a couple.

I've coupled. I've coupled.

Keeping secrets.

This is just like your secret bank code.

This is totally different. That was my secret. This is Jerry's secret.