My Sister Is My Dom Pt.1

My step-sister, Fiona, and I had known each other for several years before my divorced mom and her single dad got married. Our parents were good friends before they married so although we weren’t technically a family, we did many family type things together, especially summer vacations at Fiona’s dad’s cabin on the lake.

Fiona is three years older than I am, so she was never exactly thrilled to hang around with a younger kid during those pre-marriage outings, and once our parents did get married she avoided her little step-brother as much as I avoided my older step-sister. This is not to say we didn’t do things together, but we always sought out our own peer group when we could.

I was just starting high school when Fiona left for college. She rarely came home for visits, so we haven’t seen much of each other lately, but now she was coming for a long summer vacation. She’d just completed her third year in college and I had just graduated high school and turned eighteen-years-old.

Mom, dad, and I were already at the summer cabin when we heard Fiona pull her car into the pine-needle matted driveway. We rushed out to greet her with dad beating everyone to the car and opening the door. Fiona stepped out and hugged him tightly. “I’m glad to be home,” she said. “I’ve missed everyone so much.”

“We’re glad to see you too, honey,” Dad said. Then she hugged mom, who was almost in tears from joy. I stood back, waiting for the parental greetings to finish, and when mom finally let go of her, Fiona took a step toward me then suddenly stopped.

“Wow!” she exclaimed, “I was about to say ‘hello little bro’, but you’re not so little anymore.” She was right, when she had left for college I was barely the same height as she and very scrawny. Now, I towered over her five-foot-five frame and have put on quite a bit of muscle. “You’ve really grown,” she said while eyeing me with a suspiciously wry smile.

“You’ve changed too,” I said. Fiona was always a little heavy in high school, and being a rambunctious tomboy, never paid too much attention to her appearance. All that seems to have changed, she wore a halter top without a bra and I could see that her breasts were firm and her nipples protruded enough to be noticeable. Her arms were slim, shoulders softly rounded, and her waist was a perfect hourglass shape. She wore a pair of running shorts which showed she had a flat, taut abdomen and nicely shaped well-muscled legs. Her hips were slim and ass well-rounded. I thought, damn, my step-sister is hot; but out loud, I said, “You look good.”

We exchanged a cursory hug and all went inside. The afternoon and evening was spent reminiscing, catching up on new events, and eating dinner. I was eyeing Fiona the entire time, amazed at how good she looked. Every once in a while, she would catch me looking and grin back at me with the same devilish look she had given me earlier.

The next morning was spent packing the car. “Your mom and I have to return to work for the week,” dad informed us. “We’ll return on Saturday, so you two are alone here the entire week. Here are the rules.”

“Daddy,” Fiona whined, “I’m twenty-one. I don’t need rules to act like an adult.”

“Since you’re twenty-one, you’re in charge,” dad retorted.

“Now I have a problem,” I interjected. “I’m eighteen; I don’t need my sister to look after me.”

“Stop it, both of you,” dad said sternly. “Here are your rules. No parties. I don’t want a group of strange kids running around the place.”

“Out here, in the middle of nowhere. Maybe we could round up a group of antelope, but we’d never be able to round up enough people for a party,” I explained. Dad ignored me.

“No swimming, boating, or hiking alone. You look after each other.”

“Yes, daddy,” Fiona said appeasably.

“Yes, sir,” I said. We finished loading the car and they drove off while Fiona and I waved.

Fiona turned toward me as they drove out of sight. “Matt, let’s go swimming,” she said excitedly.

“Now?” I questioned.

“Yes, now,” she demanded. “Dad said we have to swim together, so go get your swimsuit on or I’ll call him and tell him you won’t abide by the rules.”

I shrugged my shoulders realizing this week is starting out to be a harrowing experience for me. We went inside, changed into our swimsuits, and I followed Fiona out to the lake. She wore a tiny fluorescent orange bikini. She could be seen a mile away against the backdrop of browns and greens in the woods surrounding the lake.