The weeks passed by and it seems, that the changes came to an halt. Sarah and Lucy were running now 6 laps in the morning and evening every day. Her stamina and strength was beyond human degrees. Mike and Sarah often talked about her changes and what could cause such drastic changes. One day during her 3rd lap Sarah sopped at the lake and was again overwhelmed by the beauty of the nature. It was already late autumn and still completely dark, but the moon got reflected by the lake. What do you think, should we try something new?, she asked Lucy not expecting an answer. It was about 3 am and Sarah was sure that she was alone in the forest and strip down until she was completely naked. Her body looked powerful and had a small layer of sweet. The cold night caused her to stream as she walked to the lake and submerge into the water. The water temperature was only 5°C but she felt totally comforted by the cold water as she started to swim. Not being a good swimmer, her enhanced stamina helped her a lot but she noticed the lack of chest and arm musculature as she got exhausted after 30 minutes. This was longer than she had ever swum and she was for sure a lot faster than usual. Lucy on the other hand had no problems in the water and obvious enjoyed the morning bath. Sarah let herself float some time in the lake to relax and after a quick pause and was ready for round two. This time it was much easier to swim and she really felt great, she felt powerful and energized like she could rip trees out of the ground.
As she thought about getting stronger and stronger, Sarah got lost in yet unknown desires and lust and put one of her hands between her legs and the other to her firm breast. I should not do this but this feels soooo goood, she screamed as she rubbed her clitoris faster and faster. Her climax build up but she managed to hold it back 1 time, 2 times, 3 times. GOD HELP ME!, she cried in ecstasy as she finally gave up the fight against her own desires and the an inhuman strong orgasms hit her body. She started to shake violently, GOD, I'VE NEVER FELT SOO GOOOD. YES. MORE. MORE., and passed out in the middle of the lake. Thanks to her increased stamina Sarah could hold on the breath for hours which prevented her from drowning as she sunk to the ground of the lake, where she experienced the most intensive wet dream of humankind.
Three hours later Sarah woke up the at the shore as the sun shined in her face. Lucy was laying next to her. Both were still wet from the water and after some time, Lucy realized that it must be around 7 am. Shit, I'll be late for work., she said, as she put on her pants and top, which felt strangely tight on her body, grabbed her shoes and headed barefoot with a world record breaking sprint the last mile home.