Back when I was 28, I was a middle school teacher, in a small school in the country where all my colleagues were older than me. I got along well with some of them though, espcially a 36yo chubby divorced mom. She had a nice face and great curves everywhere even if she dressed casually and nothing too sexy at school as most teachers. She liked me and often complimented me about how it shouldn't be hard for me to get girls, how many teens in school told her I was handsome and so on. It was not so much flirting than playing with the limits of our profrssional relationship, and surely get the thrill of getting the attention of a younger man.
Anyway at one point we went on a school trip abroad with another female colleague and 40+ teenagers. We stayed in a youth hostel, the teens were in rooms of 4 or 5, and the teachers in their own room. I was alone, and the two females were together. The trip went really well, we all had a good time, and I found out that my colleague was more fun than I thought. She liked to joke with me and was a more confident person than at school. She still seems to like me and was touchy feely when we laugh together. Every night we met to plan the day after, she wore a gym shorts and a T shirt for the night and I must say it was kinda sexy because of how her body filled these clothes.
The last night, the teens were a bit wild in their room so it was just me and her in my room to plan for the way back. As usual, she moved a lot around me as I sit on my bed, bending over me to show me something on her phone. And as usual, I couldn't help myself to take a look at those gorgeous tits in her cleavage. The accumulated sexual tension was off the charts and I was just hypnotized by her body moving, her large hips, her nipples poking through her shirt and her tits moving along with her. At one point she stopped, laugh and say "Hey over here" pointing at her face. She clearly liked it though, because when we were done, she stretches her arms, lifting her shirt up and tightening it over her tits, practically popping in front of my eyes. She made sure I looked, smirked and said "Want a closer look ?" She didn't wait and took off her shirt.
I gasp and obviously look at her chest, she leaned over and said, her mouth close to mine "I'm glad to see you like this", and she kisses me. We made out a few minutes, she took my hand to make me touch her breasts and we could have done this for long if it were'nt for loud noises in the teens rooms. She moved back, saw the bulge of my growing dick and looked at me with a sigh of frustration, then put her shirt back and left.
Two hours later, it was 11pm and I hear a knock at my door. I was wearing just boxers but I had the feeling it wasn't necessary to dress at this hour. When I open, she was there, smiling, and said "She's asleep \\\[our colleague\\\]". She pounced on me and we kissed again. We were standing up and hugging close, I knew she felt my dick hard against her and it didn't took her long before she took off her clothes and went on the bed. I decided to taste her pussy and went down on her. She was already so wet it was a huge turn on to fell her under my tongue. I sucked her clit for a while and she grabbed my head saying "Don't stop". After a few minutes she came, I felt her body quiver and her thighs tighten against my head.
At this point she was so horny she had no restraint at all, she was just hungry for sex and didn't want to lose one second. I lied on the bed next to her and she moved over me, pulled down my boxers and sat on my dick. "Fuck it's good, your cock is so good" It went deep inside straight in one go, and she rode me vigorously. I felt her ass clapping against me and her tits were boucing in front of me, I was just mesmerize by what I saw. I buriee me head in her breast and sucked her nipples as her hand went back to squeeze my balls. After a few minutes she began to touch her clit. We were both sat down, her on me with her legs around my waist, and hugging close while she moved on my dick. She moved her head by my neck and I hear her whsipering "I'm cumming". She came and moaned to my hear, I almost came just hearing her.
She took a moment to rest and lied next to me, stroking my cock. "Now you" she went down on me, and licked my cock like a melting ice cream in hot summer, the she sucked me while playing with my balls. I couldn't take this very long, and after less than two minutes I came inside her mouth. She kept sucking as my dick throb inside her mouth, swallowing every drop of cum. She stood up and put her clothes back "I knew you were good" she said. She kisses me and left.
The day after, she acted normal, even a bit distant. After this trip she stopped flirting but never said anything again when she catched me looking at her. We fucked once in a while for a year.