Cheated while my wife was in the next room [MF]

Ok, so before I begin I just want to start by saying cheating is bad. This took place almost 10 years ago and was the last time it happened.

My wife and I lived in the same apartment complex with my coworker and her husband. They were a few years older than us but we were all relatively young (mid 20s and early 30s). We’ll call my coworker Sarah. She wasn’t really my type at all, but she was hilarious and was “one of the guys”, always making inappropriate jokes at the best times, just all around a fun person to hang out with. She was Asian, about my height, not super thin but not fat… my wife and “type” is shorter, thin, etc. Her husband, John, was quiet and reserved. I knew him but didn’t know him well. My wife, Julie, wasn’t a big partier when she was younger and didn’t have much experience going out to bars or really drinking in general.