my step sister's birthday treat

I woke up and glanced at the alarm clock. It displayed 7:30; the sun was already coming in through the blinds, so I rolled out of bed and went into the bathroom. It is funny how the memory works, I remembered immediately it was my brother Andy’s 18th birthday, well he is really my stepbrother, but we had been together as a family for 10 years. !0 years this weekend actually, and my Mom and stepdad had gone away to spend their anniversary at a hotel resort.

Andy had said he was okay with it after a promise to have a pool party the following weekend. Deep inside I knew he was a little upset, but I was going to make it up to him, starting with breakfast in bed. I put my fingers through my short black hair and went downstairs. My “night shirt” was actually one of my Dad’s shirts, and was just long enough to cover my panties. I am not in the habit of traipsing around the house indecently dressed; I guess you would say I was a little shy. I had turned 18 a few months ago and still had my gawky teenage skinny figure. My breasts are still developing, and I just filled a B cup bra.

I made a plate of waffles and toast, added butter and strawberry jam, poured two glasses of orange juice and put everything on a tray with Andy’s birthday card. I knocked briefly on his bedroom door and entered. I guess I surprised him in the “act” because he hastily pulled up the bed sheets over his hips.

Pretending not to have noticed anything, I placed the tray on his lap.

“Happy birthday bro!” I declared, giving him a kiss on his forehead, which was now a little red from blushing.

“Err, thanks Debs.” He replied running his hand through his blond curly hair. No wonder my mother fell for his father I thought, he is so cute.

I sat on the edge of the bed; my right foot hooked under my left knee and ate the toast as Andy tucked into his waffles.

“So what have you got planned for today?” I eventually asked as I picked up the tray and placed it on his chest of drawers before sitting beside him in the bed.

“Nothing much, was just going to sit around the house, watch some TV. I have some things I should do, but I’ll do them tomorrow.”

I meant to reply “You are going to procrastinate then?” but to my horror I said instead, “You are going to masturbate then?”

It just slipped out; I guess it had been lingering on my mind. I was my turn to go bright red and I covered my face in embarrassment.

“Deborah! My innocent sister is perhaps not that innocent after all.” He paused for a while and before I could make a retort, he continued. “Why, do you want to watch?” His right hand slowly pulled the sheet down his chest. My mind froze and all I could do was watch the sheet slide down. He stopped just as a few blond curls of his pubic hair showed, I was fully aware he was watching my reaction.

“Last chance to leave.” He warned, and pulled the bed sheet off completely. His cock was already stirring and growing in size. Andy took it in his hand and slowly stroked it as I watched in fascination.

“Have you seen a guy’s cock before?” Andy asked, beginning to suspect the level of my innocence. I shook my head and lay on my side facing him, my elbow and hand supporting my head.

“Only in pictures and on video. My, you got hard very quick.”

“I am so horny, you interrupted me, remember.” He started stroking faster and little beads of moisture appeared at the tip. He slowed his pace to long strokes and closed his eyes.

“Ohhhhhhh.” Andy groaned as streams of thick white cum splashed onto his tummy. He continued to stroke himself until his cock lost its rigidity. His cum pooled in his tummy button.

“Pass me some tissues Deb.” I pulled out three and gave them to him.

“Was that good?”

“Very good, I needed that relief. Don’t you masturbate?”

I blushed again before replying. “Sometimes. How often do you do it?”

“Once I did it five times in a day, I’m sure I could do it more, just need some extra stimulation.” Andy said.

“How about trying to break that record today? I have some sexy clothes I could wear to turn you on. Consider it your birthday present.” I could not believe I had just said that.

Andy eyed me a little strangely. “If you want, I’m not going to say no.” He laughed. “The little guy agrees.” He glanced down as his cock twitched. “Have a go yourself.”

I reached out and lifted up his member, its weight and warmth surprised me. Under Andy’s instruction and suggestions, his cock soon became stiff. As I kneeled on the bed to get myself comfortable, my shirt parted and rode up my thighs. I saw him look between my legs, so I spread my knees apart giving him an unobstructed view of my translucent pink panties. I knew the material was so thin he would clearly see my triangle of black hair through them. A tingle of excitement started in my legs.

His hand rested on my knee and slowly moved up my thigh, his fingers tracing little circles on my skin. I gave out a moan and stroked his cock harder. I saw his balls retract and just as his fingers reached the apex of my thighs, he came.

“Ohhh, ohhhh, don’t stop, ohhh.” He cried.

His hot cum spurted out and I tried to coincide my hand movements with his spasms. Judging by the way his back arched, I got it right. The remains of his semen trickled over my knuckles. I got another three tissues and cleaned off his tummy.

“That’s twice; I think you are going to easily break this record.” I laughed as I stood up. “I’m going to get a shower and get dressed.”

“Wearing less is better.” He called out after me.

After a nice hot shower, I went back into my room and lay naked face up on the bed. As I thought about what I had just done, I slipped my hand between my legs and began to rub my clit. It did not take long before tingles of electricity replaced the sexual ache and that quickly developed in to a small orgasm. I rolled over pressing ...

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