"Your best friend calls you over to tell you some hot gossip. She reveals that she is about to go on a date with a new guy she met on Tinder. You get a little uncomfortable about it, she says she will make a pact with you, a ""best friend pact"". You don't fuck any women, your best friend won't either. But to be sure, you will wear a chastity cage. She puts it on you, insisting this is the only way if you don't want your hot best friend to fuck any guy. When you are all locked up she teases you, giggles, teases you with her ample tits and cleavage and her ass. She laughs at how when you are in that cage, you can't fuck anyone. She laughs and smiles at you. Noting how she finds this all so sexy. You both agree this is a surprising but sexy evolution to your friendship. She keeps your keys right her in her sexy cleavage and giggles. "