She very much likes points 1, 3 & 5.1. Propinquity
3. Social lubricants - alcohol, pot and other intoxicants lower inhibitions
4. Plausible deniability
5. And having attractive, eager and willing males around.
That’s all it takes. She should not have put herself into this situations. Sucks but it’s reality. I remember being a corporate manager and going to trade shows in Vegas with women I knew were married. One cannot unsee what I’ve witnessed.
Lord have mercy on your soul