I was shaking and breathing hard after my exertions.I fell out of her and laid on the bed. She grabbed the strap-on from the floor, got back on the be...d next to me and used it to finish herself off. Watching her fuck herself was a lovely sight to behold and it was wonderful to watch her bring herself to a shuddering climax.“Now that was a definite ten out of ten. Well done old man!”“Thank you, glad I was able to keep my end up.”After this initial ‘meeting’ we got down to business to decide what. It was pink, plastic, and rather small. I realized quickly what it must be - a chastity device. I had heard about these online, but I never expected to see one in person."What is that for?" I barely managed to stammer out, my eyes fixated on it."Why, you, of course!" Sarah replied, deviously."Wait a minute-" I began, but Sarah quickly interrupted."You said you would do anything, and I'm going to hold you to it. Besides, your performance in bed has been poor, and quite frankly, selfish, these. I asked what’s the matter she said am dumped and started crying I dint know what to do she was sobbing literally somehow I convinced her made her console and said to forget it as a nightmare.Gradually as days passed she started forgetting her past and she became so close to me that she used to say each and everything she used to do.Once I asked her shall I kiss you she was so angry that I am your senior how can you ask like that I said I love you and want to b with you forever she was shocked. She opened the box with her heart beating wildly. It was a beautiful lace nightie, delicate and fiercely suggestive. Mari quickly closed the box, totally disoriented. It was absolutely inappropriate. She decided to go there, in order to give the gift back and be clear that she wasn’t interested. Soon she was across the corridor knocking at the door. Her heart was beating, she was feverish and breathing heavily, she had sparkling eyes and dilated pupils. She already had butterflies in her.