"Multiple sources" have told the publication the pair got into a fight to end all fights that climaxed with Ellen ripping off her wedding ring and dramatically moving out.
In the report, the National Enquirer claims Ellen left the couple's LA home and has kept their split hidden from friends.
"It's all very shady and ominous. Ellen went to great lengths to keep the news from their close friends to avoid being asked questions," an insider told the publication.
"She and Portia were fighting more and more. Eventually, what normally would have been a routine back-and-forth turned nasty."
Another source told the Enquirer, "They spend less and less time together."
"In fact, they've been living separate lives," the source added. "It's gotten so bad that they hardly say a word to each other all day."
"Portia feels neglected and mistreated. She feels as if she supports Ellen in everything she does, while Ellen just gets aggravated and judgemental when it comes to her needs."
The couple are yet to respond to the National Enquirer's report.