I felt like posting this to offmychest at first because it feels dirty, and I feel really guilty but I thought you might enjoy it more here. I am a 22 year old male in a relationship of 3 years with my college girlfriend going into my senior year of college, and I currently work as a janitor. I clean a few locations each night, and rarely if ever see anyone while I work. Last night I entered a medical center I clean to find it still occupied by two ladies working late. They were not expecting anyone and it really freaked them out at first with me walking in, but they both soon warmed up to me, and I was working as usual pretty quickly. If I had to guess I would say they were in their early 30s. Both were wearing scrubs girl 1 was much better looking than girl 2. Girl 1 looked like a dead ringer for Amy Shumer, same body and everything, but I honestly didn't pay much attention for the first half an hour while I cleaned. It was about 8:30 P.M when I made it to their shared office and had to start cleaning around them, and immediately they became incredibly flirty. They were joking about having a handsome janitor and how they've watched porn with a plot like this, and even made me do a little show tunes style cleaning dance. I was a little frustrated but still enjoying the attention I was getting from them, and sent a text to my girlfriend that I was getting sexually harassed by some ladies and how it was a double standard thinking it was going to be over soon. 9 P.M roles around and they get up to leave and let me know they're on their way out, but on her way to the door girl 1 touches my chest really seductively and says "keep up the good work handsome". As soon as the door shut behind them I called my girlfriend to complain but noticed that even though girl 2 jumped in her car and left, girl one was sitting in the parking lot still. I told my girlfriend I had to go a little worried that girl 1 was sitting outside still. As I round the office I see girl 1 walk back in, she smiled at me and said she forgot something. I was shaking at this point and my heart felt weak in my chest because it seemed like something bad was going to happen and that I wasn't over reading the situation. Sure enough she calls out to me and asks me to help her carry a box to her car. Hands trembling I walked in and to my relief there was a box and she was sitting back in her chair. She said she hurt her neck picking it up and asked me to rub her shoulder. I knew it was real at this point, I was shaking but also rock hard. I told her no very sternly and said I was leaving and she should lock up, but she insisted and I let my baser instincts take over. As soon as I touched her shoulders from behind she grabbed my arms and slid them down to her breast, and as if we had been planning it all night, our bodies were all of each other. She turned around facing me as we kissed and immediately started fumbling at my pants. I sort of had become singularly focused on her breast at that point and pretty aggressively ripped her scrubs shirt off of her and unhooked her bra. She had a pretty decent body honestly, large breasts which coned out like a pears with large nipples. She had a little belly fat which I didn't find too unsightly and a little dangly cheap belly ring. She dropped to her knees and started giving me absolutely expert head, but oddly the more I started to realize what the fuck was happening the more angry I felt. I felt like this lady had just ruined my whole future with my girlfriend and grad school by seducing me and it really made angry like I've never felt before with a hot ball of rage filling my stomach. I pulled her to her feet and turned her away from me ripping her scrubs down to her ankles and then using my feet, kicked her legs apart and bent her over forcefully at the hip so she was bent over the table. She had an inny kind of pussy, but at the moment I was so mad and turned on and confused I hardly looked. I got on my knees behind her and started eating her out from behind, feeling how wet she was already and listening to her moans as I sort of haphazardly rolled my tongue around her, and then for no reason I looked at her ass hole and decided it had to be eaten out too. Never done it before in my life, never thought of doing it to a stranger, certainly not after she finished a long work day, but wtf it happened anyways I guess. I think that shocked even her a little but she seemed to be really into quickly and started spreading wider for me, which brought me back to reality a little and shocked me into stopping. I stood up and lined my cock up with her, she asked me if I had a condom and I asked her why the fuck I'd bring a condom to clean toilets and drove into her. Maybe it was the angle, but she was especially tight, and soaking wet. I could see pictures of her and her boyfriend on her desk, I grabbed her hair and held on as I pumped furiously into her. All that anger and passion made me go harder than I ever have before, her knees went out and she slapped the table and feeling her hot juices running down my leg, I latched on hard and filled her up. My first thought was how good it felt, followed by immediate and horrible regret that I came inside a stranger with no condom, followed by the urge to throw up after realizing what had just happened. She walked pantless to the bathroom and scolded me for doing that to her, mentioning her boyfriend. I was disgusted with myself and packed my car and left her inside. I have no idea what her name was, I don't know if she is going to report it, or if there were cameras, or if she will find me somehow, or if shes pregnant, or what the fuck to do about my girlfriend. Stupid fucking decision and I hate her more than I can say, but maybe one of you guys will enjoy the story, or not, I just had to confess to someone.