Rumors like this have been around since before they tied the
knot and she was pregnant with their first child.
Every other year or so he's either gotten an STD from some
chick he banged or has gotten somebody pregnant.

Divorce rumors have been around, too, also practically since
day one.
These rumors even ran when all the media wrote him off
as an aging Casanova who was getting dumped all the time,
right after Madonna and before Annette, and they'll probably
still be around when he's drooling in his bib 10 years from now.
BTW: rumors have also been going on for ages that Annette
has had several lovers on the side, as well.... Maybe that's
an agreement between the two of them.....
Looking back at his promiscuous past, I'd say he could very
well be, or have been, a sex addict. If he didn't get himself
sorted out, who knows?
Mind you: Ms. Charlton is almost always very negative
about Warren, almost like a woman scorned.......
She's certainly wrong about one thing, though: Warren
didn't plan to remain a bachelor. He'd been planning to
get married and start a (large) family since his early thirties!