I 25m found sc’s of my gf (18f) I wasn’t supposed to see.

Little back story she is a swimming teacher/ instructor. We’ve been together 8 months and everything’s been going good.

The last 3 or 4 weeks she’s been “finishing work late” or leaving later than she usually does after finish. I never really thought anything of it until the other night she was in the shower and her phone was sitting next to me on the couch and buzzed. I looked down and it was a Snapchat from a guy. Which I knew was her manager at work. I was curious so I opened it to see what they’d be chatting about. When I opened the snap I was shocked, it was a picture from his perspective looking down at the biggest cock I’ve seen (other than porn) sticking out of the zip on his pants and it was captioned “wish you were working this arvo, I need your 🐱” I just sat there shocked looking at it (partly shocked at the size 😂) I clicked off and clicked into there chat.

The first thing I see from 2 days ago was (thanks for the load” and a picture of her pussy dripping with cum. I was super shocked because she doesn’t even let me fuck her raw. Once I started scrolling there was lots of pictures of her in the staff shower, pics and videos of her on her knees sucking him, pics and videos of her bent over the sink and him fucking her, none of them he pulled out.

Turns out for the last month he’s been using her as his own Cumdump 4 or 5 days a week fter everyone else has left work. I when I heard the shower shut off I quickly put got out of sc and put the phone back down. Before realising I had the most rock hard on I’ve ever had. Safe to say as soon as she came out I jumper on her and fucked her on the couch. Quickest and hardest I’ve cum in a long time haha.