This is not turning out to be the storybook ending Peyton Manning intended for his NFL career.

The latest rumors on the Denver Broncos QB are that he and wife Ashley have an "open marriage," meaning both are free to have relationships with other people, according to Terez Owens.

Peyton Manning Becoming NFL Bad Boy As Career Comes To Close

"Yesterday we reported rumors of infidelity with Peyton Manning, having been accused of cheating on his wife," Terez Owens reported. "Now we're learning this, she cheats too, but there's a reason why. Here's what our tipster tells us, 'Ashley Manning supposedly cheats too. Another very widely distributed rumor is that the Manning's have an open marriage. There is plenty gossip about Ashley dating other men - including athletes."

Terez Owens isn't the only site to cite this rumor, however.

Revealing Wife's Condition Only Way For Peyton Manning To Clear HGH Rumors

"There have been a lot of theories and rumors to support the idea that there are many 'open marriages' amongst the ranks of professional athletes," playerswives.com reported. "And as has been the case so often, we have found rumors that suggest that Peyton Manning is cheating on his wife Ashley Manning. These same rumors suggest he is dating local Indianapolis meteorologist Angela Buchman. The theory goes on to say that the Mannings heard about this rumor online. Then, in an effort to throw people off the scent, invited Ms. Buchman to multiple Manning charity events and public appearances. The rumor continues that Buchman is on the Manning payroll to keep quiet."

Manning has yet to comment on the University of Tennessee report involving a former female athletic trainer's accusations some 20 years ago that Manning put his genitalia on her head, which is far different tact than the one he took in strongly refuting an Al Jazeera story linking him to HGH through Ashley.

The attacks on Manning's until-now squeaky-clean image would lend to the belief that there's no way he would consider returning for another season.

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