The next morning, I woke up with a normal morning hard-on. I began replaying the scene from last night in my head. My twins sister’s ass in a thong under me while soaking her panties in my cum. Her coming into my room sitting on my stomach rubbing herself spilling her girl cum all over my stomach. I was shooting another load on to my stomach in no time. And then it hit me: I never cleaned her juice off me last night. So now my body was covered in both our juices. That thought made my cock twitch and I swear I could have gone for another load. 

I stopped myself and went cleaned up in the shower. I was worried in the shower that it would be awkward when I saw Tiff, but I figured we would eventually get over it. I put on my swim trunks as we were going to the pool today and walked into the kitchen to get some breakfast. 

Tiff was already in the kitchen making us eggs and toast. The only problem was she was wearing a bikini top with a long flowing cover-up skirt on the bottom. Again, I want to state up until last night I never considered my sister in a sexual way. But now honestly it was all I could do to control my lust. The way the skirt set just on her hip. The curve of her breast. Her ass. The ass I had sprayed my cum on the night before. I wanted to go to her and tear her clothes off right then and there. But I controlled myself. This was new ground and I did not want to mess things up. What if last night had just been a lust-filled mistake that was caused by our taboo watching of that couple? No. The best course of action was to be cool and act normal. 

“Good morning, older sister!” I put emphasis on older. That is how I teased her all the time. 

“Good morning to you… baby brother,” she retorted.

Okay good. That is normal teasing for us so maybe everything will not be awkward. She turned to hand me a plate and I just stared for far too long. My god was she gorgeous.

“Here is your breakfast.” I grabbed it and hurried to the table to hide my growing erection. We ate together and goofed as though nothing happened. 

We spent the day swimming, sunbathing, reading, and just generally relaxing. It was refreshing after the craziness of yesterday. About midafternoon, though, I started to get restless so I went for a run on the walking trail. As I was not familiar with the place, I ended up on the long course and only got back to the room in time to rush in get a shower and get dressed for dinner.

I had started to calm down a little with my run. I was not as filled with lust as I had been this morning until I walked into the living room and saw Tiff standing there. She was wearing a very tight fitting red dress with no straps. The front of her dress clung to her well-formed stomach and left little to the imagination. I was shocked by her dress, but in the best way possible. I could feel my cock stir in my khakis which did little to hide my growing manhood.

“You look stunning, but aren’t we just going to a casual dinner in the dinner room here?” I asked. 

“Yes. But I wanted to look nice for the occasion. Why not have fun while we are here?” She replied. So we went down to dinner had a great time. Again, it was like nothing had happened the night before. It was all so normal and easy like we always were. I was very pleased by that and honestly had begun to think everything was in my head and that it was just something that happened and I should not dwell on it. 

After dinner, we returned to our suite to watch a movie, but when we got up to the room Tiff asked me, “Are we going to talk about last night? Or just keep pretending that it did not happen.”

I then, all of a sudden, came down with vomiting of the words, “What about last night? I mean what we did? What we saw? I mean I enjoyed it but it is wrong. I never should have let it happen. I am sorry if I hurt you or damaged our relationship…” I stopped mid-sentence because Tiff had unzipped her dress and let it fall to the floor. 

She wore no bra over her perky 38C breasts and only a dark blue thong covering her shaved pussy. She walked to her room and stood in the doorway and wave her finger in a come here motion. I walked into her room and she came really close. I could feel her tits against my arm.

“Baby brother, I don’t care about any of that. I wanted something to happen between us for some time, but you never seemed interested. So I had to make it happen.” Then she kissed me. A soft kiss far more into it than a normal brother sister kiss. 

She broke the kiss and stared into my eyes.

“Don’t you think I am beautiful, baby brother?” she asked.

Before I could answer we were kissing again. I felt her tongue tickle my lips so I opened my mouth and it was like a switch flipped. I had been reluctant to this point but no more. I wrapped my arms around her and tried to tell her with the kiss what I felt for her. While we kissed she began to strip me of my clothes. I was quickly down to my boxers and the head of my dick poking out the hole in the middle. 

She dropped to her knees and began sliding my boxers off. Tiff looked up at me and took my cock in her hand and began to slowly stroke it before planting a kiss right at the base where the cock and balls meet. I promise I thought I was going to shoot my load right there. My sister then kissed up the underside of my cock before licking the head of my dick. Again, I thought I would blow right there. I was so close and the excitement was so high I did not think I would last long.

She teasingly asked, “Are you ready baby brother?”

Again, before I could answer, she took my cock in her mouth. Then proceed to take all of my dick into her mouth. I was shocked, awed, and turned on even further. My cock began to twitch in her mouth. I just knew I was about to fill her mouth with cum, but she pulled off just enough to get her hand around the base and squeeze firmly but not to hurt me. After a few seconds, I felt the urge to explode subside. 

She stood up and pulled me to the bed. “Lay down, little brother, I want to try something different,” she cooed at me.

I did as instructed and watched and she stripped her thong from her body. I watched as the fabric separated from the wet flesh, revealing her completely naked body to me. She turned around and placed a knee on each side of my head. I looked up and saw her dripping pussy. I knew then what she wanted. I slide my hands around her perfect ass and brought her sex to my wanting mouth.

I began by kissing her lips on the outside, teasing her, avoiding giving her the pleasure she wanted. I then used my tongue to part her lips and began licking at her pussy. She moaned and squirmed as I pushed further into her love box. I finally could get my tongue inside her and flick at her g-spot (I would later discover anyway). 

Tiff had taken my dick back in her mouth and was moaning around it. We fell into a nice pace matching each other’s actions. If I felt like I was getting close, Tiff would back off not letting me cum yet. I poured my frustration into pleasuring her. I moved from her cunt to her clit and began purposefully licking at her clit. I think she let out some sort of guttural moan and that is when I felt a rush of juice in my mouth. I do not think she “squirted” per se but, man, there was a lot of juice flowing out of her. 

I kept up my assault on her sex until she pushed herself off me begging me to stop. She laid with her head at my feet for a few catching her breath. I flipped around and began kissing her in earnest again. I moved to between her legs with the head of my cock just touching her pussy lips. 

Tiff reached down and began to stroke me again. Looking directly into my eyes she said, “Are you ready for this pussy? Are you ready to fill my pussy wrapped around your thick cock, baby brother?” I simply nodded. “MMMMM so you are ready to fuck your big sister?”

And that is when it happened. When she said those words, coupled with all the edging and stroking over the past hour, I finally exploded. Stream of sperm after stream of sperm landed on her bare pussy. It coated her hand and dripped onto the bed. She kept stroking me till every last drop was out and I crashed onto the bed beside her. 

She kissed my forehead and said, “I guess I shouldn’t have pushed you so far.” I could only manage a moan in agreement.