This happened at my first job when I was in university. I didn’t know his actual age but he was middle aged while I was eighteen. I also didn’t know he was married due to the fact he didn’t wear his ring at work.
It was a small store setting, only a few workers needed each shift with him in his office. There were only three of us working that evening and I was going to be the last worker in the store as I was going to help the manager shut the store up. So it’s around 9:30pm and we’re both checking everything is as it should be when he walks over to where I was and started ‘accidentally’ rub up on me.
I thought nothing of it until his hand start to rub me through my shorts. It had been ages since my last hook up and such so I became wet very quickly. It escalated to his hand in my shorts and panties, his fingers thrusting into my pussy. I start begging for more and eventually he was fucking me over the desk in his office. He luckily pulled out and came on my ass instead of inside then sent me home.