This is my longest submission so far. It has been a while since I posted. Gentle constructive criticism and positive feedback are welcomed. All characters and events are entirely fictional. All characters are over the age of 18.
Becky and I started dating in our second semester of college. We would engage in mutual masturbation on most weekends and make love about once a month. Once school was over, Becky wanted us to spend a weekend at the beach and "do it like rabbits." Becky always wanted me to cum in her; so, she was on birth control.
However, Becky's sister, Leah, had turned 18 and wanted to join us at the beach for her birthday present. Becky said that she wanted Leah to come and that we could fool around when Leah was out of the room.
I met Leah at her 18th birthday party. Leah was basically a slightly younger version of Becky. Becky had larger breasts but Leah's were perkier. Leah was a runner and had a more slender frame.
We traveled all day to get to the beach and got there late that night. We went straight to bed. When I turned on my side to kiss Becky good night, she slid under the covers, took my dick out of the hole in my boxers, and started to suck. I was afraid that Leah could hear Becky sucking my dick. It took all my effort to not moan as Becky pleasured me with her mouth. I had to hold my breath, keep my mouth closed, and occasionally breathe through my nose. I thought that I heard Leah moving around on her bed but my back was to her. After finally releasing my semen into Becky's mouth, I could not control the sharp gasps that escaped my mouth as I tried to get oxygen from holding my breath. I thought that I heard her Leah gasp also. Becky swallowed every drop but I could taste my own semen as she kissed me good night. Needless to say, I slept soundly.
The next morning, Becky offered to grab breakfast and bring it back to the room. She told us to go ahead and get ready for the beach. Becky told me that she wanted me to wear my Speedo instead of swim trunks.
As soon as Becky left, Leah said, "I heard yall last night. Becky was sucking your dick under the covers wasn't she. She told me that she was going to do that. It made me so horny that I played with myself while listening to yall. I heard you gasp when you came and it made me cum too."
I was speechless and felt my dick start to harden and the thought of Becky playing with herself while listening to us. I decided that I needed a cool shower. I grabbed my Speedo and headed to the bathroom. I noticed Leah staring at my boxers and she giggled at the sight of my dick peeking out of my boxers.
Once in the bathroom, I took off my boxers and started the shower. Now that I was fully naked, my dick became longer and harder. I stepped in the shower and soaped up my body. I started to soap up my dick to relieve myself of my arousal.
I heard the door open. The shower only had a clear glass to keep the water in. Leah walked in completely naked. I noticed that she looked at my soaped up dick. She opened the door to the shower, stepped in, put her left finger to her lip, and grabbed my soaped dick with her right.
I stood there in shock and pleasure as Leah vigorously jerked me off. Within moments, my dick exploded cum on her tits, stomach, and legs. She took her now soaped hand and cleaned the cum off of her body. She only said, "Don't tell Becky," and then stepped out of the shower. She dried off, put on her bikini, and walked out of the bathroom.
I finished with my shower, put on my Speedo, and went to the room. Luckily, Becky came in right after I got out of the bathroom. She stripped naked and put on her bikini in front of her sister and myself. We ate breakfast and then walked to the beach.
We played in the surf and sand. We got lunch from a food truck. while we were eating, Becky whispered to me, "Leah told me that she thinks you are hot." Becky then touched the front of my Speedo. "Is my boyfriend getting turned on from watching his girlfriend and his sister playing in their bikinis?" She then squeezed my dick and observed, "My boyfriend is turned on. We will have to take care of that later. You might want to take a cool shower before Leah notices."