Some entertainment of course

"Go ahead and bend over for me then slut, face down ass up"

Adam commands his sister as he begins to stroke himself to her naked form. Shaking from all of her edges she obeys, slightly offended at the use of the word slut, though keeping silent in the hopes of being allowed an orgasm from her brother.

"Now, I want you to get three fingers in your tight little ass, I don't really care how you do it but if they're not in, in two minutes then I'm going to ram you with no lube and no preparation. Understood?"

"Please, please ...."

"Yeah, yeah do it or maybe I lose that key in a river some place"

With that final threat Adam went around to the front of his sister and began to jack himself off right in front of her face. She began to do as she was told, she took some of her juices that were still flowing down her legs and used it to lube her rose bud ass she then took three of her finger and sucked them, one by one and then spat on them several times. She then took her (now lubed) hand and began to press her index finger against her tight entrance. She grunted as her hole was entered for the first time. This predicament left her with only one hand supporting her kneeling position and she was already starting to struggle to hold it.

Upon seeing her struggle Adam decides to make it just that bit harder for her and so he decides to...