The context of the following conversation is Sasha told her friends a secret about her brother that she was not supposed to share.:
Sasha says Do you remember what I told you about my brother?.
The friend responds What, you mean the hair color thing?.
Sasha responds yes,  I wasn't supposed to share that with anybody!.
The friend responds Why's he so sensitive? Lots of guys dye their beard..
Sasha responds He just doesn't think it's very manly. Promise you won't tell anyone else?.
The friend responds I promise, and I won't even let your brother know that I know..