The context of the following conversation is Addison knew one of his friend's secrets but let it slip to his other friends, Matt and Tom.:
Addison says Hey do you know about how Halley failed her college entrance exam?.
The friend responds Yeah, I know she wanted to keep it a secret from people..
Addison responds Well, I accidentally let it slip to Matt and Tom..
The friend responds Oh, no, you know they have big mouths and everyone will know..
Addison responds I'm feeling pretty bad about letting it slip..
The friend responds Don't worry, Halley is going to have to let everyone know at some point..