Saw it happened. No one was suppose to know...Someone will always find out that is the reality. We had a ETL AP sleeping with the ETL HL, they thought no none knew. However everyone knew and they were a big joke. Another ETL HL was sleeping the the electronics tl. Again everyone knew even if they thought it was a secret. We also had an HR team member living with an ETL Food. Guess what, everyone knew. They move the ETLs (mostly young 20 somethings) into towns where they know no one. There hours are crappy so they start to hang out with other ETLs or team members. It starts innocently enough and usually ends disastrously. All of these people when it became so much of a joke were either transferred or "left to pursue other interests". I prefer to say they were promoted to guest. Outside of work, stay away from the people you work with, its better for everyone.