Everyone in the story is over the age of 18.
***
It was my brother's birthday and I wanted to do something special for him this year! Looking at the clock, I knew that my brother would be home soon. A glance around the room showed the perfect setting for his birthday surprise. The music was on, his room was cleaned, and best of all our parents were away for the weekend!
I heard the car door slam and my brother walking up the sidewalk. I stood up quickly and struck a sexy pose. My brother opened the door.
He drew in a breath when he saw his sister standing, posed for him looking breathtaking! My long, blonde hair cascaded in waves around my shoulders, my body outlined by the tight blackness of my see-through one piece. My eyes sparkled with mischief and my brother felt his cock spring to life as he shut the door behind him.
"This is the best present you have ever given me sis," he said.
"Just wait, big bro," I said. Walking to him with my heels, I reached to him and wrapped my arms around him giving him a big hug. "I've thought about you all day, I couldn't wait for you to get home." I rubbed my body against him, placing my hand on his hard-on and feeling the rigid length of the shaft. "Mm, just what I have been wanting all day."
He stretched out on top of the covers and was lying on his back with his cock standing like a flag pole, as I kissed his chest and slowly stroked up and down his hard-on with my soft, warm hand.
"Oh yes brother, I'm your slut for the whole weekend, I'll do anything you want. Anything at all, happy birthday!" I squealed as his fingers stroking my clit.