write a sex story between NAME_1 and NAME_2 with intricate details.include sucking breasts, moaning, scratching his back and sweat include details about positioning, moaning and conversations. use words like breasts and penis. etc., passionate sex. NAME_1 and NAME_2 are classmates. NAME_1 is a fitness freak who gives diet and workout plans to his friends for hobby. NAME_2 was amazed with the result NAME_1 produces with her classmates. she decides to ask for NAME_1's help for losing some weight and NAME_1 asks for money which she cant afford. she talks him to let her pay him later. he agrees and hands her a diet and workout plan. it didnt produce much results. so NAME_1 had to go to her place to foresee the workout. he touches her body to correct her posture which turns her on a bit. for NAME_1 it was completely professional. later they saw some results. it was time for her to pay him. she decides to pay him back with have sex with him. she decides to seduce him and after trying hard she seduces him and she agrees to have sex with him whenever he needs until the training program ends. NAME_2 has huge breasts which she uses to seduce him. (include direct speech) pure lust and no love.