I (20F at the time) was taking a late night shower when I typically shower in the morning. I work early and my roommate (24M) works nights. Which is perfect because he's either sleeping or working when I'm home. It's like living alone for half the rent with a friend to hang out with every once in a while when our schedules cross.
So anyway, I was taking a late night shower before bed before he cracked the door enough to talk through. He asked me to hurry up very nicely since he had to get ready for work. I said I would finish up and be out soon. Maybe 30 seconds later, he came back and actually came in the bathroom this time. He apologized and said he had to pee. We have a fully covered shower curtain, so I couldn't see him and he couldn't see me. No harm, no foul. He asked me how much longer I was gonna be and I said I had been so hot and sweaty all day, I really wanted to thoroughly rinse off.
He understood, but he also said he was gonna be ready for when I got out. I didn't really know what he meant, but I didn't hear the door close again. I poked my head out of the curtain and saw him leaning against the sink vanity in just a towel on his phone. I guess by "getting ready" he meant getting naked so that he could just hop in when I was done. I asked him if he was gonna be late and he said probably. I felt really bad so I opened the curtain and told him to hop in. I stood to one side of the tub behind the curtain so he couldn't see me immediately.
He came in a few seconds later and thanked me. I had turned my back to the open side so I couldn't see him and he could only see my back and my ass. I fully intended on rinsing my hair and hopping out. But he had a different idea.
He thanked me again as I washed my hair out and turned towards him to step out. When I opened my eyes, his hands were on his cock. He quickly dropped them, then immediately started washing himself as if he thought I didn't see him jerking himself.
"Jesus dude, I just didn't want you to be late, not to give a whole show!" I yelled as I opened the curtain to get out.
"I'm sorry, you just looked so good, I thought you asking me to come in was an invitation for something." He refuted. He was so sweet and I quickly did the mental math and definitely saw how he got to that conclusion. I guess when a woman is naked and asks a naked man to join her in the shower, it's not a far leap to assume that there's a sexual connotation at work.
I told him it was fine and got out to dry off.
As I was rubbing the towel all over me, I noticed that curtain wasn't fully closed and I could see him look out from behind it. He wasn't peaking out, he was moreso using the open side of the tub and stealing glances as a "coincidence." The more I thought about how I was essentially leaving him blue-balled, the worse I felt and the wetter I got.
"I can see you." I said all coy and cute.
"I'm not hiding that I'm looking" he retorted.
I looked at the time on my phone trying to remember when he had to leave normally.
"C'mere" I said, motioning him to the edge of the tub. I dropped to my knees and starting jerking his cock with my hands. He moaned multiple times. "This is only because I feel like an asshole for getting you naked and hard and then teasing you about it."
I then plunged my mouth down on his cock. I blew him for maybe a minute or so before he exploded in my mouth. I gagged a bit and he finished all over my face and hair as a result. I stood up and told him to hop out since I now had to wash off again.
I think his head started to clear as he got ready in front of the mirror and I rinsed off quickly once more, not bothering to close the curtain this time. I stepped out after a minute or two and dried off a second time.
He broke the silence by telling me that he wasn't normally that fast and we joked about it a bit before he went to go get dressed as was off to work. The whole thing was so hot, I didn't even bother getting dressed, I just laid in my bed naked and masturbated multiple times until I fell asleep.