Avoid taking a step too far

Sam peered through a crack in the door. Her tight little ass poking outwards as she checked to see if the coast was clear. Her thighs pressed together, with a small gap that led directly to her drenched and beautifully smooth pussy.

The image of those filthy cum covered panties making their way up her nubile thighs loved itself into my brain. The damp bit of clothing wrapping around her soft cheeks and being pulled tightly into that smooth, tight and already so moist slit. My cum sticking to her skin. Marking it. Claiming it.

I turned away. Taking a breath and letting my cock settle down.

Fuck.

I couldn't deny wanting to see her wear the panties. Couldn't deny the burning desire to see more of my cum on her perfect smooth skin. To see the fabric slip into her ass crack and to reach arras her brother shouldn't even be seeing, let alone being drenched in his cum.

But I couldn't bring myself to make it happen. Not only was my brain screaming how wrong this was to me, I didn't even know how I could make it happen.

The moment, the chance, passed. Sam slipped away, down the hall and off to the bathroom. To wash away the evidence of what happened here. Cleaning the proof of our sin off her face and hands. But no matter how hot the shower burned, no matter how much soap she rubbed herself down with, the picture would remain.

“I couldn't do it.” I texted Candi.

“Couldnt or wouldnt?” She replied.

“Both. I guess.”

“Hmmmm.”

“Is that okay?”

The message was marked as ‘read’ instantly, but no response came. Was she mad I didn't go through with it? Disappeared? Or maybe this was it. She'd pushed me as far as she could, so now I wasn't fun anymore. Another discarded toy shed twisted up and broken, only to throw it away.

Well whatever. If she was going to be that petty, then fuck her. With all the fucked up shit she'd been pushing me towards, it'd be a good thing if she never talked to me again. Sam could keep the crazy slut for all I cared. I'd be better off without-

Bzzttt

The phone buzzed and instantly my eyes flicked towards it. Forgetting anything I was thinking about to read the message.

“its a sign. I've been going to easy on u. Expect things to get much…much…harder…… from here on out ;)”

Haha right. This is what she'd call ‘going easy’ on me? Fucking sending my sister in her naked to clean the cum off of my body?

I got into bed. Just lying there and taking in the message. What the hell could she do? How could she possibly escalate her fucked up game even further?

The question kept both me and my cock, up all night long.

“A group date?” I asked.

“No. Not a ‘group date’, a date in a group.” Sam replied, getting increasingly frustrated. “It's the best way for me and Candi to hang out while mom thinks you're the one dating her. So its our date, where you and the others just happen to be tagging along.”

I caught the particular phrasing she'd used, ‘While mom thinks I'm dating Candi.’. So defensive about her relationship with her, but if she knew the full scope of the truth, would she still be?

“You get to hang out with my sexy, and available, friends. I get to spend the night with my girlfriend. Plus you and Candi can take a few pictures together for mom to see online, it works for everyone doesn't it?”

“Yeah… I guess…” I saw what she was doing here. Trying to push me off onto another of her friends and away from Candi. She probably begged the other girls to flirt with me a little. Anyway to get my mind off of her precious girlfriend. To keep Candi all for herself.

“It's not like you had anything better planned loser. Coming out with us has to be better than sitting here in the dark and jerking off too… too whatever…” She tripped up on her words. The memory of what I had, what I could be jerking off to flashing into her mind so clearly in her face. Her cheeks getting flush and the defiant bratty tone of her voice cracking.

“Yeah, I'll come.” I got out of my seat and pulled my shirt off. Looking for a nicer one to wear out. “Where are we going?”

I was also watching her reaction to me. Nothing said verbally, but I could see her eyes watching me as I rummaged around. Staring at my chest, more memories of that night coming back to her.

“Just… just some diner.” She tried not to let me catch her staring, but I could see her in the corner of my eyes. Looking right at me whenever she thought I wouldn't see.

“I figured you girls would want to go somewhere a bit more fun.” I grabbed some plain T-shirt and pulled it over my head. Taking my time, giving her ample opportunity to stare.

“Candi likes the place.” She said in a drone as she watched me change.

Interesting. I figured Sam was putting this together, but maybe Candi was planning something?

I was about to turn to follow her out, but… but my pants. They were still pretty fresh, but… I wanted to lock my best for the date… right?

Side on to Sam, I slowly pulled down my pants. Bringing my briefs with them. My cock semi hard from showing off like this, casually visible to her.

“Fuck come on.” Sam brought her hand up to cover her eyes, but she didn't leave. “Give a girl some warning.”

“Nothing you haven't seen already.” I muttered. Taking my time, slowly finding something to wear. “Sooo, this was Candi's idea?”

“Ye-yeah.” She was kinda cute all flustered like this. It wasn't a side of her I'd really seen in a while. Not since we were younger and closer, before we drifted apart.

The date being Candi's idea made me twice as interested in going. Was this her first move in this next, harder, stage of her game? The next level of fucked up twisted shit she wanted to push me towards?

I shifted towards Sam, letting her watch through cracks in her fingers and I pulled my clothes up. Not something I imagined myself doing a week ago, but I couldn't help myself. Sam, for her part, barely hid the fact that she was staring. Staring hard at her brother's cock… thinking God knows what about it…

How far we'd both fallen already. How much deeper could this rabbit hole go?

“So then” I asked. Ready for my first Friday night out in a long time.

“Who's coming?”