The next day.

When Mark got home he found the house to be quiet. He guessed his sister was asleep and was proven right when he checked her room. Stepping into the room he saw the steady rise and fall of the sheets. He walked to the side of her bed and looked down. Ashley was on her back, her comforter pulled over only the bottom half of her body. Her top half was completely bare, her perky tits pointed upwards and in plain sight for Mark to see. Her ginger red hair cascaded around her head on her pillow and her sleeping mouth was just barely opened.

Maybe it was lust filled night with Kate, or maybe it was the fact that he hadn't done anything with his sister in a while that caused Mark to reach out a hand and gently grab onto the tit closest to him. In all honesty, Mark should have stopped time if he was going to be playing with his sister but the beauty before him excited the younger brother too much. He lightly squeezed her breast and rolled her pink, perky nipple gently between two fingers. Pulling his already hardening cock out, Mark stepped closer to his sisters head. Taking hold of his meat stick, he rubbed the head around on her face, depositing a line of sticky pre-cum. Pulling back, Mark knelt down and sucked one of her nipples into his mouth and began to play with it with his tongue. It was then that Mark heard a moan of, "Mmm...mark" come from his sisters mouth. Mark froze in fear and looked at his sister, not daring to breathe. After a few seconds it seemed that she hadn't woken up and was just dreaming. Deciding it wasn't worth it to push his luck, Mark stowed his cock away and began to leave the room.

As he was opening the door, an eye on the bed snapped open. A finger slowly raised toward the line of cum and scooped it up before depositing it in a mouth. The mouth then spread into a grin as the eye watched the boy exit the bedroom, himself unaware of it's delighted gaze.

Mark awoke the next day to a text from Kate. Upon opening it, he smiled when he saw that his new girlfriend had sent him a picture of her tits and a message of how much fun she had the previous night. Jerking his cock to hardness quickly, Mark snapped a pic and sent it her way with a winky face before making his way downstairs.When he sat down to eat breakfast with his sister, Mark had expected her to tease him about how his date went. But he was pleasantly surprised when the most she had to say was teasingly thanking him for not destroying her car. After breakfast, Mark went back up to his room and laid on his bed. He was trying to decide what to do that day when he remembered the fun he had on Thursday. Going to his computer he uploaded the video he'd taken from Mari's house and copied it to his collection. He then made a fake email account and found her boyfriend's email off Facebook. Attaching all the evidence to the email, Mark smiled as he clicked the send button.

Mark looked through his collection of pictures and videos and dwelled on a thought. He had every intention of fucking every one of these girls after he fucked his sister but he wasn't sure how he'd do it or in what order. He knew that after his sister he wanted it to be his new girlfriend, Kate, that much was obvious. After much thought he decided that one he'd fuck after Kate would be Erin. He'd had fun messing with her at school and he still had plenty of more ideas to fuck with her.