Bitch of a step sister

“Mom I’m home!” I cringed as I heard my step-sister stephanie’s voice and mom’s subsequent squeal of delight. I’d told her time and again that her husband’s daughter was a demon sent to the earth, constantly putting me down, making me do her chores for her and as of the past year, weirdly slapping my ass a lot. Even more annoying than my mom’s deep love for her was the clear list all of my friends had for her. Sure she was beautiful, 5 foot 4, slim, perfect skin, enchanting smile, perky b-cups, shapely ass and long dark hair that always framed her perfect bone structure and big brown eyes. Ok maybe I think she’s gorgeous too, but I see past the exterior beauty to the dark twisted interior of her warped soul. I mean sure I’d enjoyed a few jerk off sessions inspired by her, but I’m only human.

I was thumping away at my Xbox controller, trying my best to ignore the excited conversation from downstairs, when my door was flung open, making me jump in my chair. I turned to find my laughing step sister standing in my doorway. “Jesus stephanie you scared me. Ever heard of knocking?” I said irritably.

She gave me the fake pout and puppy dog eyes that made our parents always ignore her misdeeds and stay in their good graces. Batting her eyes at me she said, “oh I’m so sorry john, I was just too excited to see my darling baby brother. Come give me a hug.”

Her pout morphed into a smirk as I sighed and walked over to give her a quick hug. I wrapped my arms around her and immediately went to disengage but she held me firm and whispered, “You will be mine this summer.” She then smacked my ass hard, making me wince at the sting and walked off before I could ask what she meant.

I stood there for a time, confused as I often was after interacting with that demoness. A call from mom downstairs shook me from my revelries and I walked down ti where my moms and step dad were standing excitedly with big smile and clear anticipation. Under normal circumstances this would make me happy for them, but as my gaze fell on stephanie, I saw her maniacal grin and felt my heart drop. This was going to be bad for me.

Before I could ask any questions, mom grabbed my hands and jumped up and down excitedly. “John you’ll never believe it! Your dad and I are going to Europe for the summer! His work is relocating him there but since it’s not full-time, we get to explore all summer! We wanted to tell you earlier but we had to make sure stephanie was okay watching you and the house this summer first.”

There was absolutely no way I was going to live under the tyranny of my sister for the whole summer, but I also couldn’t take this away from my parents. For all their faults, they are very good people and other than ignoring stephanie, they’d always done right by me. So, instead of protesting the trip, I took a different approach. “That’s great guys, I’m happy for you both! But we don’t need to inconvenience stephanie like this, I’m sure she has a lot she wants to do now that she’s a college student and it’s summer break. I’m 18 and can take care of myself.”

Mom looked torn, but before we could discuss this further, stephanie walked up beside me and gave her biggest fake smile to our parents, yes I can tell when they’re fake. “John’s being silly. We all know he does need me to watch him, we will be a team to make sure everything goes smoothly so you can enjoy your trip.”

Beaming with pride, mom clapped her hands and squealed, “Yay, thank you both so much! But just in case there are any issues, I want you to listen to your sister john. Now let’s have a quick dinner and then we are off to the airport!”

I chose to ignore the victory stephanie had gotten by being put in charge and shared a delicious meal with my family. Stephanie kept shooting me cryptic looks that if I hadn’t known any better were hungry, but other than that, it was a good dinner. After we were done, steph and I helped mom and dad load their bags and waved to them as they drive off. The second they were gone Steph turned to me with an evil smirk...