In the episode as it aired, Charlotte dumped him after an argument over whether he could be with her if she refused to perform oral sex.
Despite the two seeming like a great fit who wanted to be exclusive outside of the bedroom, his expectations for oral sex were too much for Charlotte, and they called it quits.
The episode was actually the seventh ever to hit the airwaves back in 1998, so Sex and the City was still working out the kinks as it figured itself out.
Unsurprisingly, Charlotte’s relationship with Michael did not end up as one of the epic romances of the series.