After nearly nine years of marriage, Ellen DeGeneres and Portia de Rossi's relationship is hanging by a thread.

A source tells Life & Style exclusively that the pair is struggling once again, despite attending therapy following their last rough patch. “They’ve been trying really hard to keep their marriage together, but it seems like time is running out," the insider, who's close to the couple, admits. "They’re just always at each other’s throats.”

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The duo is even arguing about their upcoming wedding anniversary in August. “Ellen wants to plan an elaborate anniversary and Portia just wants her to concentrate on fixing their marriage,” the insider shares. “She feels like Ellen puts a Band-Aid on their problems.”

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But it's not just close friends who have noticed the tension. During a recent outing at Craig's restaurant in West Hollywood, the couple was definitely out of sync. “Ellen seemed miserable and Portia just looked sad,” one patron told Life & Style, while a staffer added, “‘Happy’ isn’t the first word I would use to describe them."

A different source revealed last month that the pair would often be caught arguing in front of Ellen Show employees. “Ellen hates that. She never wants people at work to know about her personal problems,” the source said. “It was a huge wake-up call for her.”

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Things seemed good for awhile — the actors were photographed holding hands at a pre-Oscars party in LA on Feb. 25 — but they've deteriorated since then. “It’s all about spending quality time together, but still giving each other space during the workday,” the source shared at the time. Unfortunately, their therapy-suggested date nights don't appear to have helped.

For more on the couple’s relationship, pick up the latest issue of Life & Style, on newsstands now. And scroll through the gallery below for a look back at which celebs have been scared on the comedienne’s talk show!