AceShowbiz - Lukas Gage's infidelity is said to be final straw in his marriage to Chris Appleton. Rumor has it that the hairstylist caught his now-estranged husband cheating on him days before he decided to call it quits with the actor.

"Lukas cheated on Chris and Chris found out over the weekend," a source tells Us Weekly. "That's the reason [Chris] filed." The so-called insider additionally notes that "they were never in an open relationship," despite previous rumor.

Daily Mail previously claimed that it was Lukas who ended the relationship because of his spouse's alleged "controlling" tendency. "Lukas broke it off because Chris was controlling and possessive, and he really thought that he was the most important person on earth," a source explained to the outlet.

The source claimed that the couple "played" together, but suggested that their open relationship could have created a rift between them. Chris "filed first to save face" and "conveniently waited until after the wedding episode aired on 'The Kardashians'," making "everyone [think] it's so shady," the source added.

However, another source begged to differ, claiming, "There was never an open relationship, Chris never cheated on Lukas. The timing of the filming is irrelevant to the episode, there was no choice but to file when he did."

"There was a side to Lukas that Chris did not see prior to the marriage and this being Chris's first marriage he went with a lot of love," the second source said of the reason behind the split, before adding, "They had a prenup and the split is easy considering it's only been six months of marriage. Right now they are not getting along, at all."

Chris filed for divorce on Monday, November 13 after only six months of marriage, citing irreconcilable differences. The couple married in Las Vegas in April and the ceremony was documented on Hulu's series "The Kardashians" just last week.