I tend to doubt this story. Politics aside, Rendell is a natural people person and a very friendly, open guy with a ready smile. This is not an endorsement, but he has been a consistently upbeat and accessible public figure for the past 40 years. I ran into him on street corners, in department stores, diners, all over the City of Philly when he was DA or Mayor. He is a very smart lawyer who is highly unlikely to have paraded an illicit situation in public. His wife is also a very attractive, smart and accomplished woman. I’m not buying it at this point.
True... I worked at 15'th and Arch in Philadelphia in the late 70's when he was Philadelphia's DA. He was a regular in some of the coffee/lunch spots in the neighborhood, and always mingled and chatted it up with us "locals".
People said that about Ted Bundy too.
Everything you said could equally apply to Bill Clinton.
In contrast to what you've said I've heard around Philly that he's a well known horndog. I've no personal knowledge. Rumors only.