u/Flat_Document_7464

Years ago, I had a roommate who needed some help studying maths.

Not that she was stupid or anything. Quite the opposite. She was actually very good at it, smart and ALL (she is having had a great career) but she was very emotional and easily affected by stress. The day before an exam, she would always get a bit anxious. I was a couple of years older than her, and I already knew the material she was studying.

She used to come into my room, moaning and sighing and complaining, and eventually, almost out of the blue, she'd pull my trousers down. She knew that when I was bored, I didn't feel like doing much, but seeing her gently playing with my cock in her mouth would immediately snap me out of my apathy.

It usually only lasted a few minutes. They weren't full blowjobs: mostly handjobs or teasing with her tongue... but she'd often get naked. Sometimes she'd even make me cum or let me take pictures of her to jerk off to later. Fine by me; she was really cute, and luckily there were plenty of maths tests.

She had a boyfriend. Nothing too serious, but they had been together steadily for a couple of years, if I remember correctly. She was one of those girls who believed that if there was no penetration or real emotional involvement, it wasn't cheating. Go figure them out...

The funny thing was that she had quite an... unpredictable temperament. Once, after she'd done well on a very important maths test, she was getting ready to go out and celebrate with her boyfriend. Freshly showered, with her hair done, her make-up on, smelling wonderful, and already running a bit late, she decided to give me a present—one she knew I'd been longing for. A full blowjob.

She warned me not to come on her face. She practically ordered me not to.

I swear I didn't mean to, but that evening, unlike when we used to play our little games in the afternoon, when she was all natural and without make-up (still pretty, mind you)... she was just too... irresistible. Glowing, almost.

Despite trying to hold myself back, even squeezing my balls, I couldn't stop a couple of spurts of cum from landing on her hair and in her eyes.

She looked at me, her eyes blazing, her cheeks flushed. She didn't say a word, but she started nibbling on my glans with her teeth. Not a bad feeling, until... she took a big bite out of my cock, sinking her little white teeth into it.

Despite the slight pain, I had the most powerful ejaculation of my life. I didn't even know it was possible to cum that much. I completely covered her. I feared that he was going to kill me but... I think that she was turned her on. With my cum dripping all over her, smiling without saying a word, she took off her evening dress.

She stayed home that night.

She called her boyfriend while I fucked her slowly from behind, trying to keep her moans under control.

He never suspected a thing. It was the hottest thing ever.