This is the third part of 'Helping out girlfriend's sister' series. You don't really need to have read the other two to follow the story, but you might enjoy the build up a bit better if you decide to go through them first.
****
"She told me everything, Dan."
Jen and I were in the kitchen, making brunch. I was on toast duty while Jen was busy making a pot of coffee. The smells filling the room were our typical late Sunday morning / early afternoon routine, just the two of us. We had our backs to each other as we finished our respective tasks. I paused as she had uttered the words I dreaded the most.
"Excuse me?" I gulped, focussing intently on slicing the fresh bread. Fuck.
Jen's sister, Jess (yep, it can get confusing sometimes when talking about them! What were their parents thinking when it came to names?) had come round to practise her massage techniques on me last week to finish her training course. It had turned into a long session of her groping and fucking me. Not that I had put up much of a fight.
Since then, I hadn't heard anything from Jess. No texts. No messages passed on through Jen. No threats of what she had planned next. I was relieved in one sense but slightly disappointed in another - followed by crushing guilt of what I'd done to my girlfriend. And this see-sawing of emotions had eaten up at me over the past seven days.
"She told me what happened during your session," she explained, stirring the coffee granules in the freshly poured water. She then replaced the lid and strainer and turned round to me. I clumsily dropped the bread into the toaster and stayed facing the wall. Delaying the inevitable.
I felt her hands wraps around my waist. Which surprised me.
"She told me..." she started, as if trying to find the right words. "She told me you got a little... excited. Down here. When she was massaging your legs."
She slid her hands down my stomach and over my crotch. She rubbed my cock through my tracksuit bottoms. What was going on?
"I..." I started, not sure what to say.
Jen giggled and continued to playfully move her hand up and down the growing movement in my trousers.
"It's nothing to be embarrassed about," she reassured me. "I told her it was probably my fault, as I'd given you half a blowjob that morning."
"You what?!" I said a little too loudly.
"Relax," she said softly, continuing to rub my cock through the cotton. "I didn't want her getting an ego trip and thinking you were actually turned on by what she was doing."
She then stopped rubbing.
"You weren't, were you?" she asked.
I snorted. Trying to sound as if the idea was ridiculous. Her sister. The oiled up, tattooed goddess in all her curvy, shapely ass glory. Running her hand up my thigh as I lay on my stomach, grazing my balls and slipping a hand underneath to grab my cock... I snapped back to reality.
"Don't be silly," I said, willing the toast to pop up and distract from this conversation.
Jen started rubbing me again.
"I mean, I wouldn't blame you. She is gorgeous," she said. "And I also wouldn't blame you if her hands started to excite you after I'd had my lips around this."
She squeezed my growing cock gently. Blood now rushing from my head to my groin.
"I mean, so much touching is bound to get some things going. It's only human nature," she continued, rubbing me a little harder. As if to prove her point, my cock was getting harder and harder.
She slowly turned me around and dropped to her knees. Her hands then ran up to my waist and started to tug at my waistband.
"What's going on?" I stupidly asked.
"Well, when she told me how hard you were, I..." she broke off, as she pulled by pants down. As if on cue, my hard cock sprung up and she gasped with a smile on her face.
"Is it weird to say it kind of, well, turned me on?"
I couldn't believe what I was hearing. Although I doubted she would have been as turned on if she'd known what else had happened. She gently grasped my cock.
"The thought of Jess rubbing your legs and you trying to hide this from her," she said, as she gripped a little harder. "Was it embarrassing?"
I said nothing, too scared to give a response.
"Did you dread her hands sliding up and getting closer? What if she'd accidentally touched it?"
Jen was getting carried away now, as she starting stroking me. The rhythmic motion of her hand jerking my cock caused me to let out a slight moan.
"I bet you were scared to move, weren't you? Hoping that she'd not ask you to turn over and unleash this on her."
She couldn't have been closer to the truth. But as she carried on jerking me off, flicking her tongue every now and then on the head of my cock, I could tell she was enjoying what she perceived to be my embarrassment. Was she getting off on the power trip? Of me feeling exposed and awkward around her sister?
"If I'd have been there, and saw this making an appearance, I think I would have needed to do something to help you out."
She engulfed my cock. Greedily taking it in. My eyes rolled into the back of my head. Fuck me. She ran her lips up and down my shaft, darting her tongue over and around the head of my cock. Tickling the underneath with the tip of her tongue. Just the way she knew I liked.
"What would you have done?" I teased back, after a few minutes, looking down at her.
She widened her eyes and playfully sighed as she continued sucking my cock. She seemed glad that I was playing along. She pulled away and stroked me more.
"I'd have walked over and taken this big, fat cock in my hands. Then started stroking it."
As she said this, she stroked me faster. I moaned in response.
"Then I'd have..."
She greedily went back to sucking to show me. Her mouth went all the way down to my base, as she took my whole length. She gagged a little, spit and drool splurting out and onto my cock. She then stood up, pulled up her silk nightie and leaned her naked ass in to me. My now wet cock slid between her ass cheeks.
"Would you have liked that? In front of Jess?" she playfully asked again, grinding her hips and ass against me. "Would it have made you feel even more awkward?"
