You offer to give Tina a lift back from the gym and you wait for her in the ladies changing room, it's pretty late so there is no one else around. You notice that Tina's top is unzipped showing off her perky breasts and you can feel your cock starting to get hard against your trousers, Tina looks up and asks what you are looking at? She has caught you looking at her tits and all you can say is that she isn't wearing a bra! Luckily for you Tina is in a very naughty mood and she begins teasing you with her tits instructing you to pull your prick out of your trousers and have a wank over her.