The days that followed after I masturbated with my step-sister on her bed was some of the wildest in my life.
We had broken our rule, but partially. We found some ground that really was okay. If we were in the mood, one of us would be okay with masturbating next to the other, or at the same time, as long as we keep a distance. It was so exciting. It was so different. It was still a little uncomfortable at first but after a few times we both were used to it.
It quickly became a daily routine. The day after that first time I suggested we soil her sheets again and she agreed. We finished up in an hour, and continued whatever else we were doing. We then expanded our horizons to different settings. First, we thought it would be pretty hot if I masturbated alone in her bed, and she did the same in mine. We both came in the sheets of course, I slept in Kylie's cum that night. After that, though, the next day Kylie finally had to wash her sheets so we just needed more ideas.
That's when it really took off. That next day we took turns watching each other masturbate in the shower. The day after that, the living room. The kitchen. The back yard, even mom's room. It was some sexy addiction that we both shared.
Sometimes, Kylie didn't want to touch herself, so I instead just rubbed one out with her in the room. There were a few times watching the movie where she purposefully lied down so that her ass was facing me so I could jerk off in the back. The days where mom was home just made it more exciting. I was tasked with beating my dick in the living room, and Kylie would give me a signal if mom was coming. It was a game we would be play to not only ease the boredom but get some excitement out of it as well.
Once we had gotten super comfortable with it, Kylie wanted to spice things up here and there. One day, she brought me a shot glass.
"What's this for?" I asked her, lounging out on the couch.
"I don't know if this is crossing our line, but I want you to fill this up with cum. I know it'll take several hours, I don't care."
I shot her a weird look. "Why do you want it?"
"I want you to watch me drink the whole thing once it's full," she added. "I want you to watch your step-sister swallow your cum."
The thought of it and her wording made me hard right there.
"Alright," I mumbled, taking my dick out in front of her." "I'll give it to you when I'm done."
Kylie left to go to her room for a few hours. I had to cum several times, but of course a few hours wasn't enough. It actually took me three days. She couldn't wait, but I had to bring her back to reality. I allowed her to watch me as I attempted to fill it a time or two. Once the disgusting shot glass was filled, I brought it to her door. She grabbed it and sniffed.
"You really delivered with this one," she said. "When do you want me to drink it?"
"You better chug it right now," I said. "That was too much work. I want to just go back to beating off next to you again."
"Okay, fine," she said, before turning the glass up. After taking a sip, she lowered it back down, about to spit it out, but I didn't let her. I shoved the shot glass back up and into her mouth, guiding her head as well. I didn't let go until she had consumed the whole thing.
It took Kylie a second to put the glass down and collect herself. "That was different," she said, still digesting my cum. "But I enjoyed it nevertheless. Thanks for the meal."
"This doesn't mean you can start having my cum now," I said, leaving her room. "Our rule still applies."
After that stunt business resumed as usual. We tried a few more different spots and scenarios and we really were having fun, we had gotten too comfortable. We even took nudes to make her friends jealous a few more times, and I took "professional" nudes of her for her to use whenever she pleased, in exchange for me keeping them too. One time she texted me at 1am.
"Could I get a dic pic?" She said. "I'm horny."
"How I about I come over there and let you see in person?" I added. "We are next door after all, dumbass."
She replied, "Haha okay."
That night, we had to be quiet because my mom was certainly home. That night, our rules changed again.
"I want more of your cum," she said. "Can we negotiate?"
"I love to watch you swallow it," I said. "But I don't know. That might be crossing the line."
She sighed. "I think it is the line, truthfully."
I looked over at her, curious about her thoughts on the subject.
"We can stop it here at me eating your cum. We can still masturbate next to each other, you can also just cum on me if you want. I'll open my mouth, you can aim."
"Ask me again when I'm about to cum," I said, pulling my dick out, ready. "Okay," she replied, removing her sheets, already nude.
She enticed the dirty talked during the session, she knew what she was doing.
"I want to milk you dry," she said. "I want every ounce you'll give me," she moaned. "Please feed me," she cried.
Once I was about to fire, I turned to her, and demanded she open her mouth. She did so quickly, and I almost accidentally shoved my dick in her mouth. Surprisingly, I shot one of my biggest loads down her throat. She came at the same time I finished shooting my load. Before she swallowed, she let me watch her swirl it around in her mouth.
"Your cum might be the best I've tasted," she said after swallowing. I had gotten up and was about to go to sleep.
"Good, because you're getting more," I said. "I'm about to abuse this rule."
"Good," she said. "You're exciting me."
The next days after that were even more eventful that the last. I made sure I got my cum in just about anything she would consume. I would jerk off in her cereal, I would force her to let me cum on our dinner. Sometimes I would jerk off and then walk up to her and demand her to open up, and she always did. There was one day where I came in my mom's cereal for our entertainment. Not for the sexual arousal, but because we thought it was funny. Mom didn't notice much of a difference however, other than saying the cereal was good.
Though we were having fun, our time was actually beginning to run out. Before we knew it it was mid-August. We were both going our separate ways in a week.
One afternoon, I walked into the bathroom she was showering in. We had a walk in shower, so you could see her body through the glass. I sat down on the toilet and started masturbating.
"Didn't know I was giving a show," she said, actually finishing up. "Thought I'd take advantage," I said.
A few minutes passed and she was done. Kylie walked out and dried herself with a towel. Before putting clothes on, however, she stood in front of me, ass facing my cock.
"Want me to twerk?" She said.
