Melissa Rivers’ nasty breakup with her boyfriend Jason Zimmerman is the focus of this season of her reality show, and in this exclusive sneak peek obtained by RadarOnline.com,  she sobs when she learns about his online porn problem.

In the upcoming episode of Joan and Melissa: Joan Knows Best? Melissa is with her mother Joan Rivers and their whole staff is talking about websites, revealing the news that Jason was chatting with porn stars online and solicited sex on Craigslist.

Melissa Rivers let her 78-year-old mother inject her with fertility drugs — after practicing on an orange — and RadarOnline.com has the photos.

Granted, if anyone is familiar with needles, it's Joan Rivers.