[NSFW] Two siblings, Ben and Mary, were told by their single mother she got a new babysitter....

Ben and Mary complained to their mom, "But we are 14 and 15 years old!! WE DON'T NEED A BABYSITTER". Their mom was having none of it and went out anyways to pick up the new babysitter.

A few hours later, she came home and said, "Kids, this is Jenny your new babysitter. I am leaving on a business trip for a few days, so Jenny will watch you while I'm gone." After their mother left, Ben, Mary and Jenny sat down and watched some TV for a while, ate dinner and finally went to bed at around 9.

Ben was lying in bed naked about to fall asleep when he heard the door of his room open slowly. He sat up quickly and there was Jenny standing in the doorway. He shouted "JENNY! What are you doing in here?" Without making even a noise, Jenny hopped on the bed and started giving oral sex to Ben. Ben didn't know what to do and just allowed it to happen. After a few minutes he couldn't take it anymore, got himself propped up, and started having sex with Jenny. After it was over, Jenny left the room and Ben fell right asleep.

The next night, Ben and Mary went to bed at 9 again. Ben laid in bed for a while hoping Jenny would come back in. About an hour went by and she wasn't there yet, so he decided to go and see what she was up to.

After looking in most of the rooms in the house, he couldn't find Jenny anywhere. He walked back towards his room, and when he walked by Mary's room, he heard a loud moan. He opened Mary's door, and there was Jenny, furiously going to town between Marys legs.

"MARY!!! JENNY!!! WHAT IS GOING ON?" He screamed. Mary then shot up and looked at Ben and said "BEN, I NEED A DICK! COME MAKE LOVE TO ME" "BUT YOUR MY SISTER, I CANT DO THAT" "JUST DO IT BEN I NEED IT"

Ben and Mary had sex and then laid down on the bed afterwards. "Wow that was great!" Said Mary. "It was, but we can NEVER tell Mom about this!" Ben then said.

Mary agreed, and then they both looked at Jenny. Ben said to Jenny "Thanks Jenny! If it wasn't for you we would have never done this. You're the best dog a family ever had!"