Walked In On My Mum (F45 at the time) Fucking The Builder

So this happened about 3 years ago, at the time I was 18. I was working some pretty long shifts at this job I hated, usually leaving the house around 7am and getting back close to 7pm most days, and I was living with my mum at this time as I basically had no money and had just left full-time education. We were having some building work done at the time, just having a new kitchen installed that was taking about a week to do. Never really noticed anything weird happening at the time, but after all the work was completed I noticed that one of the guys who’d worked on our kitchen was calling over a lot, mostly parking at the bottom of our driveway or parking down the road trying not to get seen. It happened for a couple days before I didn’t see him, but in the house you could smell that he’d been indoors as he smoked a lot and you could just smell smoke in mostly the hallway and up the stairs. My Mum claimed I was ‘going mad’ and that I was just imaging the smell.
Anyways, a few more days go by, so this is about a couple weeks now after the kitchen is all done and complete. I actually had the day off from work, but I still got up early to go out with my friends and go on a day out. It got cut short, so I was home pretty early in the afternoon, and obviously my Mum wasn’t expecting me. As I drove down the road I saw that this guy’s van was parked at the end of the road, so I knew he was at my house. I parked away from my house and walked, just to see what was happening. As I opened the door I saw his shoes on the ground and could smell that he was here with the strong smell of cigarettes in the air. Only took me a few more moments to realise that my Mum was upstairs with this guy, getting her insides rearranged as she was moaning pretty loud, on top of the fact her bed was squeaking each time they moved. I stayed silent, didn’t even go upstairs as to not scare him off, and I just waited downstairs for a while.
About 10, maybe 20 minutes passed with the sound of my Mum moaning and begging this guy to do more to her, her bed squeaking and the guy grunting and occasionally saying something to my Mum
before I guess he’d finished and made his way down the stairs. I stopped in the kitchen whilst he walked out the door and he jogged back to his van. My mum didn’t come downstairs, so I just waited to hear his van start up before I made my way back to my car, and acted as if nothing had happened.
When I got back, my Mum was red in the face but she told me she’d just got back from a walk. I knew she was lying but I think she thought she’d tricked me. I don’t know if they hooked up again, more than likely they did, but I didn’t catch him again.

Source: reddit.com/r/sexystories/comments/ut58we/walked_in_on_my_mum_f45_at_the_time_fucking_the