It appears that model Dean McDermott allegedly cheated on wife Tori Spelling with wasn't completely off with her claims that she slept with the actor because he had a 'sexless' marriage.

A new report claims that the couple's marriage began to fall apart when Spelling could not give McDermott as much sex as he wanted after giving birth to four kids within a six-year timespan.

Radar Online reports that a source said McDermott always wanted to have a very active and imaginative sex life, something Spelling had made a priority until after the birth of the couple's fourth child, son Finn.

Dean McDermott Rehab a 'Drastic Step' to Save Marriage?

Beforehand however, Spelling reportedly always made the couple's sex life a priority, even admitting that she got pregnant with her fourth child so soon after her third was born because she didn't want McDermott to think their sex life would take a toll.

"I didn't want Dean to think that the sex was going downhill," The Daily Mail reports she said at the time.

However, after a difficult pregnancy with Finn, the actress' worst fears came to surface.

"Having four children so quickly is life-changing," a source said. "It took a toll on her both mentally and physically."

Allegations that McDermott cheated with 28-year-old model Emily Goodhand while promoting his hosting gig on Chopped: Canada first surfaced around Christmas Eve.

At the time, Goodhand claimed McDermott told her that while he loved his wife, they were no longer having sex.

Since the news broke, neither Spelling nor McDermott has confirmed rumors that they were splitting, though McDermott did check into a rehab facility Jan. 23, citing "health and personal issues."

Separation 'Not an Option' for Tori SPelling and Dean McDermott?

Still, even rehab may not be enough to save the couple's marriage, as Spelling is reportedly still humiliated and devastated that McDermott cheated on her so publicly.

"She will never trust him again," the source said.

Tags: Dean McDermott Tori Spelling