[MF] Girlfriend’s Twin Sister Watches Me Masturbate in the Shower

It was a lazy Sunday morning like any other. I woke up in my then girlfriend’s bed after a long night out. She had already gone to work by the time I woke up, and since I was a bit hungover I figured a shower was a good idea. I needed to wake up, and more importantly, I needed a place to take care of my morning wood without a mess.

My girlfriend Molly lived with her twin sister Katie in a very nice apartment in the downtown area of a sizable city. Molly and Katie were identical twins, both short and thick blondes with pretty faces and stunning blue eyes. They were very close and shared many things, though I was not one of them, yet.

Katie was single and was out often, and I assumed she must‘ve already gone to brunch with some friends when I heard no one else in the apartment that morning. I rolled out of bed and strolled towards the upstairs bathroom situated between Molly and Katie’s rooms, not bothering to even put boxers on and hide my morning glory.

The bathroom was big, with a large, all glass shower that Molly and I had made frequent use of. I turned the water on and let the hot jets cascade over me. It felt invigorating and I quickly lost myself relaxing as the steam rose around me. I found Molly’s conditioner and lathered up my hands, before taking my stiffening shaft between them.

I let out a soft moan as my slick hands began to massage my cock, the sensitivity of a hungover early morning erection never ceasing to amaze. I went slow, one hand at a time, gliding from the base over every inch until I was working my fat, cut, head. It felt incredible and I was in no rush to finish, I was basking in the moment and I wanted to elongate and maximize my pleasure.

As a few minutes of self love passed I felt my orgasm beginning to build, rumbling down within my loins. My heavy balls had begun to tighten despite the heat of the shower and I made the decision to edge myself and slow down. I reached down and grabbed my balls firmly, cupping and pulling them down a bit as I stopped stimulating my cock for a moment. I grunted involuntarily as I watched my cock throb underneath the flow of the shower.

I turned around to grab more conditioner and that’s when I saw Katie had entered the bathroom. I stopped moving immediately, bottle of conditioner in one hand, throbbing cock pointing at her like an arrow. I hoped briefly the steam from the shower made it hard to see my current state but her open mouthed stare told me otherwise.

”Sorry,” she blurted out, “I thought you were Molly.“

I blushed deeply, attempting to stammer out an apology of my own despite the blood flowing to the wrong head at a continued rapid pace.

“No need to apologize,” she said with a sly grin, “I’m the one who…*interrupted* you.”

I blushed even harder now, feeling my face flush. “Oh it’s uh, just the morning, you know, I wasn’t, um-“

She giggled as she shook her head, “Really it’s ok, a man has needs I get it. It’s not like I haven’t seen the videos you send Molly, but I do have to say it looks even better in person.”

Totally thrown off at this point I had no idea how to respond. “Umm, thanks,“ I said meekly, face still beet red, cock still rock hard.

”Don’t mention it. But I do have to say, it’d be a shame to waste how hard you are, you should probably finish what you started.” She accented her comment with a lip bite as she took a step closer to the shower.

I was flabbergasted, “I, uh, I don’t know if that’s such a good idea,” I tried in vain to reason with her. “Wouldn’t Molly be upset?”

“For watching you jerk off? She sends me your videos, I’ve seen you cum I don’t know how many times. Now I want to see it in person. I’m not even in there with you, just lather up those big strong hands and show me how you make yourself feel good. Look at you, you’re throbbing, don’t deny us both.”

I lost the will to argue any more and I did as I was told. I lathered up again and began to slowly stroke myself, moaning again softly as my eager cock received the stimulation it craved once more.

“Mmm that’s it, work every inch of that fat cock. Mmmm.”

I couldn’t believe this was happening but I embraced it and did my best to put on a show for Katie. I switched up my tempo and grip, spending time just on my shaft, then up to the head, teasing it before thrusting it into my hand, pumping my hips as I grunted with pleasure. It felt amazing and I was getting close quickly.

Katie’s eyes were locked on me as she kept spouting encouragement. She leaned over to let me see her cleavage spilling out of her top as she sucked on her finger while I dreamed it was my cock.

“Fuck,” I grunted, ”I’m getting close.” The pressure in my cock was enormous and I felt a massive load ready to escape.

“Mmm fuck yeah baby, stroke that cock for me until you cum. Think about covering these big titties.“

I didn’t need to hear anymore, I pumped fast and felt my orgasm begin to wash over me. I moaned loudly as I began to cum, feeling hot ropes of cum blasting out of my engorged head. Rope after rope shot all over the glass in Katie’s direction as I thrusted into my hand while I kept stroking.

“Ffffuckkkk, fuck, fuck,” was all I could muster as I emptied my balls, the glass covered in my hot seed by the time I finished.

“Mmm now THAT was fucking hot. I need to convince Molly to let me fuck you with her soon, I bet that big dick feels fucking incredible when it’s cumming inside.”

Chest heaving, still in shock I didn’t even have a response. “Um, yes please.”

”We’ll make it happen. Thanks for the show big boy. Let me know when you’re up for Round 2.”

Source: reddit.com/r/gonewildstories/comments/12k59js/mf_girlfriends_twin_sister_watches_me_masturbate