Just For Fun - Sex Stories

Just For Fun

... back between her legs. I watched, transfixed, as she played with her clit.

"You're using your tongue on his head," I continued, stumbling over the words. "He's grabbing your hair, and...-"

"What are you doing, she gasped once more.

"Oh, god..."

My clit involuntarily throbbed.

"I'm touching myself."

"More."

"I'm rubbing myself," I panted. "I'm rubbing myself watching you go down on my brother."

"I belong to him."

"You belong to him."

"Continue."

"I'm...I'm getting off, watching my brother use you."

"More."

"I'm making myself cum. I'm watching my girlfriend be used for her one true purpose, and I'm...I'm watching. I'm watching, and I'm getting off, and..."

My eyes shut as I felt an orgasm approaching. To my delight and horror, Emily picked up where I'd left off.

"Your brother is watching you get off. As he fucks my mouth, he's watching his own sister cum."

Yes.

"He's cumming into my body, but you're the one who's getting him off. You're the one who's making him cum. He's watching your huge tits bounce, he's looking at your face.

"Justin is imagining fucking you. He's cumming into my mouth as he imagines fucking his own sister. I'm his slut. I'm..I'm..."

Her words faded away as she came.

###

"Justin would love that outfit on you," Emily said, distracting me from the TV.

"Stop it," I protested weakly. She just smiled, and leaned in closer.

"It's true," she whispered. As my girlfriend nibbled on my ear, I ...

... melted.

I was wearing lingerie. We both were. We'd always liked it, but recently...it was like wearing anything else just feltwrong. Even under our stuffy work clothes, there was something delicious about knowing I was wearing a lacy outfit that showed off my body.

"If your brother saw you in that," - I groaned, involuntarily - "he'd get so hard, wouldn't he?"

"Yes..." I whispered, my eyes closed.

"Your body would turn him on, wouldn't it?"

"Mm-hm..."

"His sister's body would get him so worked up. Your huge tits, your long blonde hair, thatass..."

I knew it was wrong.

"He's going to be so hard, so worked up."

"Emily..."

"What are we going to do about it?"

I groaned, and tried to pull her mouth to mine. But she remained tantalizingly out of reach, a familiar smirk on her face.

"What are we going to do about your poor, horny brother?"

"You need to help him," I gasped.

"How?"

"Fuck him. Please. Please, Emily...fuck my brother."

"You want me to fuck your brother?"

"I need it. Please."

"Even though you're the one who got him so worked up?"

"Yessss..."

"But what if I'm out of town?"

My eyelids fluttered as I pictured it. Justin, so horny, so hard. Emily, his personal fucktoy, away on a conference.

There was only one way we could...

"No," I gasped. "I can't. Please..."

As if registering my distress for the first time, my girlfriend leaned in.

"It's okay," she whispered, her smile audible. "It's just a fetish. It ...