It's France, firing without valid and substential reason is illegal.

How is she not unprofessional? She was dating her boss.

He was referring to the boss, not OP

yes but they were BOTH unprofessional because its unprofessional to date a coworker let alone your boss.

you can date a coworker and still maintain professionalism. granted, it's a tricky situation that can be very risky, but it's possible. my boyfriend and I have been together about year and a half, working together the entire time, with no issues, because we keep the personal and professional entirely separate. Still, I admit, it's usually not a good idea. we understood that going in.

My parents will be married 20 years this year, and they met through work.

To be honest i really don't see how it's very unprofessional. As long as they didn't mix their relationship with work and he didn't show favoritism, there would be no problem. Can't help who you have feelings for

It takes two to tango. OP was also unprofessional for dating her boss.

And what is HR going to say to her for banging her boss!?? Yeah, not the best idea to go to HR and complain about her boss and her having an affair.

Reporting him to HR because the boss and OP were having an affair is like calling the cops because someone stole your weed. You're just snitching on yourself.

sadly, this has actually happened

Came here to comment that as well haha. I always thought it translated more to "slut" though!

whats the first life rule?

Life rule #1: Get a job. Lol.