Tindra has a test coming up soon and she is struggling with her revision, you have offered to let her look through your books but it's not making much difference. As she leans over on your sofa to read your notes you notice that you can see straight down her top, Tindra catches you looking and decides to use the situation to her advantage. While you are staring at her cleavage she makes you a deal telling you that she will let you wank over her big tits if you help her out with the test.