Since I arrived in grade seven at my school, there was this hot as hell teacher... about 20 when I arrived, massive brown eyes, blonde hair in a ponytail, and big boobs which would always stick out a little bit (she wore a white t-shirt and over that a green shirt, buttoned up to just below her gorgeous round tits).
I always had a bit of a crush on her, and being pretty eloquent and intelligent for a kid I used to talk to her whenever I could. I didn't have her for any classes until grade ten (I was 15) though, when I got her for geography. I always used to imagine her making out with this girl in my class, and that thought really used to get me going (probably the reason I failed geography, I never paid attention). Anyway, about a month into this class we rearranged the desks into a big circle and I somehow managed to get to sit next to her every lesson. She was never able to control the class so everyone always spent every lesson talking, and so I spent the lessons talking to her while she occasionally typed on her laptop. After a while we started flirting a bit (like I said... modesty aside I was pretty intelligent for my age, I was 15 going on 30, so it didn't actually feel weird) and we developed quite a rapport.
Anyway; at the end of the year I came to see her in her office about what was going to be on the exam. And as she was talking, she kept sliding down further and further into her swivel chair, her (shortish) skirt going wider and wider open... until I could quite clearly see her panties, and she knew I could. They were lovely, with pale green and white stripes. Anyway, she gave this funny sort of smile as she kept talking, and I suddenly realised that this had gone beyond us play flirting... so I made an excuse to get out of there fast!
We sort of avoided each other for the rest of the year after that, but whenever we ran into each other she'd blush and glance away from making eye contact...
I've always wondered what would have happened if instead of leaving I'd just sat down and sunk my face into her breasts, as I'd so often fantasized about doing.
I wish we got a do-over for some of these things; it would be almost having to go through the rest of school again