I was about 21 when I ran into my oldest sister's friend while out drinking. She was around six years older than me. It wasn't safe for her to drive home, so she came back to crash at my place. It was purely innocent—no flirting, no plans; I was just being helpful. We were both tired and tipsy. I offered to stay on the couch, but she said, "Don't be silly, just go to bed." So, we both instantly passed out in my queen bed.
It was summer, and the night was hot. I woke up feeling hungover, but still with my usual morning wood, just a sheet covering us. She was facing away, and as soon as I moved, she turned over. She was already awake but had been still to let me sleep. When she noticed the tent in the sheets, she laughed.
"Thank you for not letting me drive last night," she said, casually pulling the sheet and my boxers down, grabbing my cock.
"Better take care of this," she added, starting a nice, slow handjob. She took her time, and for how I was feeling, it was just perfect. She pulled up my t-shirt, and I assumed that’s where she thought the cum would land.
I wasn’t in a hurry to cum and wanted this to last longer. But then she sat up, switched my cock to her left hand, and rubbed her right hand over my chest, abdomen, thighs, and balls. This got me going, and I started to breathe heavily. She asked if I was going to cum, and I said yes. She lay back down, took my throbbing cock in her right hand, and jerked me firmly and rapidly.
A shot of precum leapt out onto my chest. She kept going, then slowed down, probably thinking I had cum. "Keep going, I'm going to cum. Long strokes!" I grunted.
"Oh! Okay," she responded with a giggle, giving about five long strokes from tip to base. I bucked my hips up, and with each of the next three strokes, thick streams of cum shot up and landed on my chest. She gave a few more strokes before two big wads fired out and hit her on the face. She screamed but kept going, coaxing out the last couple of shots and squeezing out some oozing cum.
"This wasn't supposed to be part of it!" she exclaimed, pointing to the streaks of my semen stuck to her face from her chin to her forehead and hair. "You need to warn a girl that you're going to cum like that!"
I massaged my softening cock a few times, in stunned excitement. I had fantasized about ejaculating on a chicks face before, now I had finally done it - even if on accident. It was incredibly satisfying.
With another giggle, she got up to clean herself in the bathroom.
Soon, she left with just a hug and a stern warning: "Our secret, right?"