Ticklish Babysitter

First of all, I do not own this story. Another SAFF member posted it two months ago. As the story is written in German, I decided to translate it.

Original story: Kitzliger Babysitter (German)

Ticklish Babysitter

It all happened when I was 18 years old. Then, I was entirely unexperienced in terms of girls. My parents were invited to a friend's house and I couldn't go with them. So my friend Sven, who was 18 years old as well, came over to my house. Since I screwed up before our neighbour's daughter Elena had to take care of us. Perhaps I should describe Elena firstly. At that time, she was 19. She had red hair and freckles. When she came over, she wore jeans and a tight-fitting top.

My parents said goodbye and we had dinner. When Elena finished washing the dishes, my friend and I wanted to play truth or dare. So we went to my room and started playing. It all began harmless until Elena chose dare. "Let me tie your hands together", Sven said. She agreed and Sven took a rope which he had brought in his rucksack. Elena turned round and Sven began. She wanted to turn round again, but Sven told her he wasn't done yet. He took one end of the rope and tied up her elbows, too. When Elena turned around, words failed me. Her top was even tighter than before due to her tied up elbows and you could clearly see her breasts as well as two points I knew nothing about.

We continued playing. Later on, Elena chose truth. Sven asked her if she enjoyed being captive. She didn't want to admit that she didn't, so she just said yes, and it would be even better with her feet tied up as well.
Big mistake! When it was Sven's turn again and Elena picked dare, he wanted to tie her up to the bed. She lay down and Sven told me to help him. He gave me a rope and took another one himself. "Now I'm gonna show you how to do it the best way." He wrapped one end of his rope around one foot and told me to do it with the other one. Elena though he was going to tie them together, but he tied the feet to the bedposts. Then he tied her elbows to the other bedposts. He looked thoughtful, for he still wasn't satisfied. He lifted her top, wound a rope around her belly and fixed it to the bed frame. Now he looked content. "What do you think?", Sven asked me. "That looks great. But in the Wild West movies the captives always have fabrics in their mouth." "No, you won't do that. It's enough!" But Sven liked the idea of it. He tried to put some socks in her mouth, but she didn't want to. "We're gonna manage that. Tickle her!" So I started tickling her armpits, but Elena tried really hard not to open her mouth. I got wilder and slightly touched her breasts sometimes. In doing so I noticed that they seemed to grow. By now Elena couldn't take it any longer and opened her mouth to protest, but before she could say something Sven had already put the socks in her mouth.

I wanted to know what happened to Elena's breasts, so I asked Sven: "Hey Sven, Elena's breasts somehow grew while I tickled her. Particularly those two points here. How's that possible?" "Well, I can explain it to you. Listen. If you touch her breasts like this, the breasts notice it and expand towards you so that you don't stop. By the way, these little points are the nipples. They want to get something as well. Rub them between your thumb and your forefinger. Sometimes the breasts are even longing for more. Then you have to stroke them directly on the skin. You can lift Elena's top to do that. I'm gonna go to the kitchen cause I'm thirsty, so you can carry on on your own." Sven left the room and I began to stroke Elena's breasts. She had closed her eyes and started breathing heavily. I noticed, how hard her nipples were, so I rubbed them between my thumb and forefinger as Sven had told me. A few minutes later they were hard as stone. Elena really reared up against her bonds. She tried again and again to push up her back and press her breasts against my hand. I lifted up her top and for the first time in my life I saw the breasts of a woman, because she didn't wear a bra. When I rubbed her nipples again Elena held her breath and her body suddenly reared up. He did that a few times, then Elena starded breathing normally and her breasts had their normal size again. I looked to the door and saw Sven standing there. He smiled. We untied her and she thanked us. She said she really had enjoyed it and we should do it some time again. But that's another story.