Anna was quite tall, an inch taller than her little brother, and her build was athletic, even bordering on muscular. Whilst her appearance was not exa...tly feminine, it seemed to have a strange attraction to men, for she had never had problems with getting them - and women, too, for Matt knew for a fact that she was bisexual. Her medium-length blonde hair spilled down to her shoulders, and her blue eyes sparkled with joy as she embraced her sibling. Matt could feel her large breasts pressing. As soon as I touched his naked dick, he came all over my hand. He kissed me some more, licked my hand and told me that "It was good". On the way to my house, he didn't say anything else to me. I tried to get him to meet me somewhere again, promising more sexy undies and some better action, but he wasn't interested. What a prostitute I was, no repeat business. When I got out of the car, I said good-bye and watched as he drive off. That was it, my first and last. It wasn't until later. I could feel the head pushing against the thin tissue. Our eyes met and I could see a tear forming in the corner of Beth’s eye. She mouthed “I love you big brother”. I mouthed back “ I love you too baby sister. With that Beth pushed down until my cock was completely buried in her pussy. She cried out a little as my cock pushed through the thin tissue and my heart almost broke wishing she didn’t have to go through this pain. She held still for a few seconds then she started moving her. It was eighty degrees and a cool breeze floated off of the ocean. It made for a perfect swimming and people watching kind of day. She looked to her left and peered into the pit at the many bodybuilders. They were slaving away with iron and making those rude noises. As she continued to look around she recognized one of her neighbors; the guy that lived across the hall from her. He was laying on his back doing what she knew to be bench presses. And my God - did it look like a lot of weight!His.