[MF] My Sister-in-Law needs Tutoring

Sara was a brat. She loved to tease and taunt me at times when she knew I was unable to immediately respond. The thrill of how I reacted when I was finally able to get my hands on her was always evident in a small smirk.

I thoroughly enjoyed the times when I caught her by surprise when she thought she was safe.

I was spending time with my wife, Anna, outside. We were always finding projects to work on together. Sara was in her room “studying”. She was actually sending me filthy messages and pictures of her either dressing up or playing with herself.

“I bet Daddy wishes he could put his little fuck toy in her place instead of getting all sweaty outside.” Accompanied by a picture of her wearing a ball-gag and nipple-clamps.

“Aren’t you supposed to be getting ready for a test tomorrow?” I only responded on occasion while Anna was distracted. There was a certain element of excitement to it. But I was also a bit aggravated. Sara was getting jealous and petty and trying to interrupt my time with Anna.

“If Daddy doesn’t want my little needy ass, I’ll have to find someone who does.” A picture of her in her floor length mirror, butt plug in place.

I felt my phone vibrate a few more times as I worked with Anna before excusing myself to go to the bathroom. I opened and closed the door quietly, grabbed a roll of gorilla tape from the kitchen, and quietly waited by Sara’s door with my phone out in silent.

New message. “Maybe I should go crawl in Daddy’s bed and make myself squirt all over the sheets.”

I burst into her room. Sara was on the bed naked, laptop and phone beside her with music playing on her speakers. A short shriek escaped her as she tried to jump out of bed. I caught her easily and pinned her back on the bed. I taped her mouth closed, dragged her kicking off the edge of the bed using my weight to hold her down, and tapped her arms to the bed post.

A few swats of my hand on her soaked pussy made her whimper and stop struggling. I got up and pulled the bullet vibrator from her side table, turned it on low, and taped it over her clit before binding her legs together.

“You are being a brat. You are not focusing on your school properly, and you are trying to interrupt my time with Anna. So now you will sit here and think about how you can better use your time tonight to get ready for your exam. Before bed I’ll be testing you on what you need to know. I hope you are preparred.” I checked her hands and feet making sure the tape wasn’t too tight, then left her, closing the door.

I checked on her again a little later. The vibrator had died. Her eyes were red from tears, and the remnants of her cumming was still drying.

“Have you thought about what you did and what you will do?”
She nodded.

“Don’t make a sound.” I told her. I removed the tape, first from her mouth, getting a whimper, then from her arms and legs. The tape over the vibrator was barely sticking still. I kissed her gently.

“Now be a good girl. Get cleaned up while Anna is outside. I’ll be working with you later.”

“Ok, Daddy.” She murmured.

After Anna fell asleep, I had Sara meet me in the workshop with her laptop and books. She was wearing sweats and a tanktop now. We went over the curriculum that she was supposed to know for a short time. Then I had her strip down and stand with her hands on the workbench facing away from me.

I quizzed her. Every right answer got her a tally. Every wrong answer got her a spank that left her pale ass red and made her jump. She failed the first quiz. I gave her time to review her notes. Then we quizzed again. She did better. But her ass was entirely a bright red by now.
She passed the third quiz.

“Good job, sweety. Now if you do well tomorrow, you’ll get a reward.”

“And if I fail?”

“A punishment.”

“Yes, Daddy.” She said, looking nervous.

“Aren’t you going to thank me?” I asked.
She looked down and saw the bulge in my jeans. With her usual smirk she knelt. Pulling me free, she took her time telling me thank you. Using her tongue and hands, and fighting to take me as deep in her throat ad she could before pulling off.

“Thank you, Daddy. I knew you wanted me.”

I pulled her up into my lap.

“Of course I do. But your classes are important. Now, let me wish you good luck tomorrow.”

The pent up desire from the whole day had her riding me hard. Until I took over. I ravaged her against the wall of the shop until cum was leaking from her pussy.

The next morning, Anna was already at work when I woke up. I woke Sara by eating her out in bed before she got ready to go to school. Later she called me. She was between classes sitting in her car, telling me how she thought she had did well. But she was distracted because her sore ass kept reminding her of the night before and making her horny. So now she was on the phone with me while fingering herself between classes.

A few days later she got her exam back. Nearly perfect score. As a reward I planned a date for her. But first I had plans for Anna. It was going to be busy.

Source: reddit.com/r/gonewildstories/comments/xwjeno/mf_my_sisterinlaw_needs_tutoring