"No, I'm not doing that... Knock it off, you can't force me to do anything, that wasn't our deal."
I rolled over onto my side, drawn like a magnet to the source of the arguing. Kelly turned and frowned, before clicking off the phone, cutting whoever it was off mid-sentence. The look on her face was stressed about whatever the call was. I quickly shuffled to a sitting up position, reaching out to her.
"Jake--" Kelly started, but I beat her to it. My lips were against hers, and almost immediately she was kissing me back. Her soft lips parted for my tongue to meet hers, and my hands wandered over her sides and back. I pulled her onto my lap slowly throughout the kiss, my hands holding her ass.
"Hah... well, you sure know how to make my day better," she chuckled, looking me up and down, her eyes lingering on my waist. I followed her gaze and sighed.
"Look... I just woke up, and I only took care of you last night... I mean! Not that there's anything wrong with that, I just... well..."
Kelly just giggled, putting a finger to my lips. Perfectly on cue, I fell silent, anxious to be judged. Here was this beautiful girl, slowly wrapping her fingers around my shaft. "I've always wondered what it's like to wake up with morning wood..."
She pushed my legs open so that she could sit between them, my cock standing erect between our crotches. Her hand slid up and down my length, with her thumb paying special attention to the tip. My breathing deepened as she continued to play with me, but I couldn't shake the feeling something was wrong.
"Kelly, the phone call-" I gasped as she suddenly grabbed my dick with a tight squeeze. The look in her eyes could kill, and without letting up on her grip she continued stroking. "I... I just want to make sure you're ok..."
"It was that asshole," Kelly muttered under her breath. Her strokes became rough and aggressive, tugging and squishing my cock with each angered thrust. I understood who she meant immediately, though I didn't know what to say to help ease the situation - or her grip on my cock.
"L-look, take it easy..." I pleaded, whimpering a little as Kelly kept up the furious jacking off. If anything, telling my sister to calm down was a mistake, as she began to jack me off faster and harder. Somehow, despite the discomfort that was bordering on almost pain, I wasn't getting soft. If anything, my shaft throbbed in her grip, begging for release.
Minutes passed with our panting the only thing breaking the silence, before Kelly started to slow down again. "I'm yours," she stated, almost too calmly for how she'd been acting. "And you're mine. Don't forget that." I gulped, nodding my agreement. My sister, claiming me and giving herself to me, while stroking my cock? Fuck, it was too much to handle, and I fell back against the bed. A loud groan rattled through my throat as I sprayed both of us with my cum. Shot after shot fired through the air in random directions thanks to my sister's death grip on my shaft. I winced as a thick rope hit my sister in the face, running across an eye and down her cheek to her lips.