📚 side-effects Part 23 of 10
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GAY SEX STORIES

Side Effects

Side Effects

by Hentyty66
7 min read
4.5 (18200 views)
gayfemboycrossdressersissybig coc
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Warning: all characters are over 18 years old and fictional. But they are based on real experiences.

I'm a bit of a curious soul. I've always found that powerful legs are a good thing, especially to look at. So i've asked my nutritionist mother to help me get fat healthy thighs. Eating the diet she provided and keeping my core and shoulders slim toned helped me look slim thick. My mom also suggested taking womens vitamin daily. Looking in the mirror now at 19 I have little to no fat other than my round perky bubble butt, shoulder length brown hair, and thin hair on my body with no facial hair. Actually, I look really femme if I straightened my hair and wore my moms thong...which is what i'm doing currently. My cheeks swallow the lacy fabric, my small penis is basically nonexistent, and my breasts are a lil swollen for some reason. I have inverted nipples with a pepperoni sized pink areola.

"Hun we need to pick up your grandpa now. Lets go." Mom alerted me. I completely forgot that my college dorm that i'm moving to is near the retirement home that we're moving my 72 year old grandpa to. He's widowed, lonely, and starting to fall by himself in his house. So, now we've got to hit two birds with one stone by packing our car to edges for two people. I was planning on just wearing the thong and moving in my dorm today. Well, whats the worst that could happen? I put on my thin basketball shorts and made sure my pomegranate lip moisturizer on which made their cupid bow aura pop.

We picked up grandpa and had one more load of stuff that only fit in the passenger seat. "So, I guess you'll have to ride on your grandpas lap hun. Good thing he's still got meat on those old bones." I arched my eyebrow at my grandpa who was already getting in the back seat. I sighed and followed him. My grandpa was quiet now a days due to being lonely I guess. But he is big standing at 6 foot with a beer belly. At my 5 foot 7 inches height and smaller frame he completely envelopes me. I sat directly in his lap and we were off. The road was bumpy and my mom called her brother letting him know that we are taking grandpa which turned into a full blown convo. My mom was very talkative. The road was actually kinda bumpy too which led me to involuntarily scooting back and nestle down on my grandpas crotch. The vibrations from the road made my plump ass jiggle and essentially twerk on his crotch. My grandpas bulge started to grow and I noted that he is very large down there, but i chose to ignore it. As I said, I am very curious. I am straight, I like girls, I think my mom is super hot and sometimes i think about her taking big cocks like her boyfriends. That thought process leads me to look up big cocks when i use her dildo to masterbate. But I've never had to urge to be with a man before. Mmm but thinking of masterbating had me subconsciously grinding my ass against my grandpas thick dick.

"Hey, little one. Are you okay?" My grandpa shifted and leaned forward to whisper to me breaking me from my horny spell.

"Oh, um, yeah. Sorry grandpa I-I was just thinking of something hard-else." I stuttered.

He sat back for a minute and I was still afraid to move. His large erection was stuffed in between my buns. He leaned forward again. "Are you wearing a thong?" he asked lightly. I deflated. Shit he probably sees its outline by now, i'm caught. "And you smell like your mothers shampoo. Are you..?" He paused. I started grinding again subconsciously thinking of the lengths i went to just to feel femme today. Why? I'm a boy. I'm straight. I like cock every once in a while but not all the time.

"Mmmm." I moaned. My grandpas hands grabbed my waist and pulled my ass down on him. His dick has to be as big as my mom's boyfriends. I need it all of a sudden.

"Lean up real quick, hon." My grandpa asked. I obliged lifting myself up off his lap for a second. He shuffled around and put his hands back on my waist and slid my shorts down just off my ass then pulled me down. This time it was his bare cock that my fat ass enveloped. I held in my moans as he used my body to masterbate. After a couple of minute of smushing my ass on his big cock he reached around and up to my nipples to rub and pinch them causing electricity to jolt thru my body.

"Aaahhh" I accidentally voiced.

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"Are you okay back there?" My mom asked. I straightened up and said yeah. But my grandpa pushed on my back to lean forward again. So I leaned up to kiss my moms cheek and surprise her. "Oh, honey be careful."

"I am mom. I just figure i'd give Grandpa a rest from my heaviness."

"Oh, yes. You're not heavy at all son. Go ahead sit back down." Mom dismissed to go back to talking to my uncle. Grandpa moved my panties to the side and guided me back down til the head of his massive cock was at my entrance. I bit my lip as I slowly descended into madness and pleasure. My grandpas big cock stretched me so good. I struggled to not moan but half way down I had to stop or I'd cum right there.

"Get your faggot ass all the way down, boy." My grandpa's demeanor changed a bit. He's more aggressive and cold. "I. Don't. Care. If. Your. Mother. Hears. You. Faggot." He emphasized every word for every inch that I took until I had finally hit bottom.

"AAHHH uggh." I let out. I started gyrating my hips and mixing up my insides with his dick. He's right he didn't care if my mom heard us and to be honest I didn't care either right now.

My grandpa grabbed a fistful of my hair and pulled back while I grinded on him. "Oh yeah, just like that you fucking faggot!"

"Unnnhh Ugggh ohfuck unnngggghhh grandpa your dick is so big." I moaned.

"Take my fucking big dick bitch!" He finally grunted and started spasming.

"What the fuck is going on back there?" My mom hung up on my uncle and was looking back in the rearview. I didn't care if she saw us at this point i was making my first cock cum inside me.

"Shut the fuck up bitch. It's been so fucking long since I've got any and now i'm gonna take whats mine." My grandpa snapped.

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"Oh my fucking god you're fucking my son, Dad?" My mom didn't sound mad anymore just disappointed.

"You mean your gay sissy bitch of a son?" He started pumping harder.

"OH FUCK" I moaned.

"Just don't make a mess." My mom reminded.

"I'm cumming. I'm cumming in this tight gay ass." My grandpa claimed and he was right it was like a geyser going off inside me. "Oh yeah, I took this fat ass first didn't I? MMMmmm so good just like your mothers." And with that I came. My whole body convulsed and I passed out.

Waking up we had gotten to our destination. My grandpa was still inside me so i had pull him out as i got out of the car. I pulled my thong up and shorts as my mom slammed the car door. "Are you happy with yourself?" she shouted.

"I don't know what happened mom. one minute we're just riding and then grandpa is fucking me."

"That was a nice going away party gift." My grandpa said as he zipped himself up.

"fuck i miss that thing sometimes." my mom said under her breath. "Well I guess all the work we put in has pulled off baby. You're basically a femboy now. I just didn't expect you'd let your grandpa be your first."

"Work?" I asked confused.

"Yeah, the workouts, the diet, you taking my clothes and the estrogen pills. Your aura is now just that of a femboy. I'm happy about with the side effects. Lemme call your brother so he can help us with the bags. Oh and try not to seduce him." She winked as she walked away for a sec.

"What the hell. My family is weird as fuck." I stood on shaky legs trying to process the whole thing. After a minute or two I smile knowing I can wear panties and tease guys and get dick without having to hide my true self. I can't wait for the real fun to start.

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