Playing during sex with another guy a bit and her like it happened in the past may seem ok,
but behind her back flirting with another guy, maybe she couldn’t take it.
Gender doesn’t matter, it is the flirt behind her back usually, some consider it cheating.
Was a “strained” relationship earlier tonight. Went to bed and talked a bit. Hope it works out this time too. They have other problems with constant ISP problems!