By accident I over heard a BS session between a girlfreind and her freinds once. It's preaty much the fantisy many women have of getting even with men over very trivial slights. In the thros of emotion women like men will snap and act out what they suppress. I once walked through a door at the same time a girlfreind did which starteled the both of us. I bumped into one of her breasts by accident trying to stop my forward motion and she started trying to kick me in the berries. After I got her subdued and rational she said she didnt care that it was an accident she wanted to get even for it happening.
Over the years Ive known a few guys who woke up in the hospitol after getting into bed thinking everything was aok with the O'l lady. None of them cheated, they just never had a clue how well women suppress that kind of insanity, or what really ticks em off. Time of month and hormones is often a threshold to these events. Many men say the same thing. She is so sweet and wonderful except for about a week every month or so.