We have been monogamous / exclusive. But:

In September I had to chat with her about being flirty with woman at the club. She engages in a way that’s inviting. I told her it’s going to lead to someone reacting and it will get us both in trouble.

Then.

Something she kept from me December that I just found out. She went out for a work party and said a girl kissed her. She stopped it. She said she didn’t engage in anyway to make her do this. After prying it out of her. She later admitted she may have engaged in a way that caused this to happen. She was dancing closely with her.

So no... not a squeaky clean 5 months.