Just as I tap the button on my phone to snap a quick photo in the mirror, the door to my room swings open, revealing my best friend Mason.
His eyes immediately drop to my waist as I was adjusting my shorts and an intense blush blossoms on his cheeks.
“John! Dude!” He covers his eyes and steps inside, closing the door behind him, “What the hell are you doing?!”
I roll my eyes and toss my phone onto the bed before flopping down on it myself.
“Really man? Are you trying to get me killed? It's Sarah for the time being.” I said as i was adjusting myself.
His face shifts as Mason realizes the mistake. I can't really blame him though, he's known me as John for the vast majority of our lives. Up until I became a prime witness for a huge criminal case a month ago and had to be placed in witness protection. They insisted on using a new method of disguising witnesses' identities and not wanting to get killed, I agreed to it. Little did I know that it would mean they used some crazy scientific process to literally reshape me until I looked nothing like myself, and swapped my gender on top of everything else.
They barely even gave me time to adjust to my new body before they were handing me all sorts of paperwork and explaining my backstory. For the foreseeable future, I was Sarah Andrews, adopted cousin of Mason Smith, who was staying with Mason's family for a while due to her parents going through a messy divorce. The new identity was created that way because it was close enough to my old life as to not cause too much mental dissonance, while also making it difficult for any one who'd want retribution against me to find me. It was also all on a very need to know basis, only my parents, Mason's parents, and Mason knew about the change.
“Sorry, Sarah,” he clarifies, “What the hell are you doing?”
I shrug, “Iunno, I'm an eighteen year old guy, just graduated from high school, spending my last summer vacation before college in a chick’s body, posing as my best friend's cousin! So I'm sorry if I'm taking some pics to use once I'm back to normal.”
Mason steps closer, a puzzled look on his face, “So you're saying…”
My hands shoot up above my head in an exasperated gesture, “Yes Mason, I'm horny as hell! And I have no good way of relieving myself!”
“Have you uh…” the blush returns to his face.
“Yes Mason, I have fingered myself. In fact, I've had to wash these sheets damn near daily because of how much I am fingering myself.”
Mason looks like he short circuited.
“But these!” I hold up my index and middle finger, “Are not cutting it anymore! I've got this need, deep in my core, that I can't quite satisfy.”
“Well…that sounds pretty rough.” He turns towards the door, “Guess I'll let you figure it out.”
As he reaches for the door knob and starts to pull the door open, I jump up and dart over, using my hand to push the door shut again and trapping him between it and my body. “Nope, you're going to help me figure it out.”
Mason swallows nervously as he turns to face me, even though I'm almost a foot shorter than him now, it's clear who is in charge. “What…what do you mean?”
I roll my eyes again, “I mean your parents are still at work for another few hours, and witness protection only made me look like I'm related to you, we aren't actually blood relatives.” A desperate sigh escapes my lips as I am groping is huge cock, “So what I'm saying… what I'm asking is that you consider helping your best friend out by… fucking my tight pussy.”
He's as red as a tomato, “I…uh…I mean…is it…are you sure that's something you'd want?”
“It sure as fuck feels like something I want. I'll worry about the implications about my sexuality another time, right now I just need this heat dealt with.”
Mason appears to think it over for a moment before nodding slowly, “Okay…I'll uh…help out.”
“Oh thank God,” my shoulders relax as I turn away towards the bed. I pull my top off over my head, letting my surprisingly large breasts bounce free.
“Then get undressed and get over here.”
He nearly tumbles right onto his face while shimmying out of his pants and tossing his shirt aside. Mason climbs onto the bed and lays back, his eyes locked on my chest.
I straddle his legs and hook my fingers into the waistband of his boxers, “Now this will probably be a little weird at first…” with one tug, I pull his underwear down and free his already aching huge cock, making it my turn to blush. “...orrrr you're already hard.”
“Ha…sorry…maybe I got a little excited.”
I began worshipping his huge white cock and said “Pffft, don't apologize, I'm a little excited too.”
I sit back between his legs and lift mine up to let my underwear slide down them, leaving my perfect feminine mound exposed.
Then I straddle his body again, this time so that I'm positioned right over his shaft. I reach down and line it up with my entrance, “Ready?”
All he does is nod.
I slowly lower myself down, inch my inch. My lip gets pinched between my teeth as Mason's dick fills me infinitely better than my fingers ever did. Before I know it, I'm bottomed out, with my hands resting on his chest.
What followed wasn't a long experience, but it certainly scratched the itch I needed it to. I bounced and grinded my hips into his lap, his hands gripped my waist like vises. Because of my dire need, I came quick and hard, but kept on riding.
It was a glorious few minutes before he told me he was close,
making me slide him out and letting him use my mouth while I was on my knees.
He made a mess of my face and we both collapsed side by side laughing.
“That was…wow.” He mutters.
“Yeah that hit the fucking spot.” I bump him with my elbow, a smirk on my face, “Thanks for the help, cousin.”
Mason's hands cover his face, “Oh my God shut upppp.”