On a recent date night for Ashlee Simpson and husband Evan Ross, tension between the duo was palpable.

The couple, who attended a performance by his mother Diana Ross at the Hollywood Bowl in LA on July 15, were bickering nonstop throughout the evening, an eyewitness tells Life & Style.

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“Evan and Ashlee’s night out was a complete disaster,” the source shares. “Even though they were seated in a box near the stage, they spent more time staring daggers at each other and exchanging angry words than listening to Diana.”

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Things got so heated that the pair left before the end of the show. “He looked mad as hell and so did she!” the witness adds.

The celebrity couple married in August 2014 and welcomed daughter Jagger Snow in July 2015. Ashlee also has a son, Bronx, from her previous marriage to Pete Wentz.

Here's hoping the duo can work things out for the sake of their children!

For more on their relationship, pick up the latest issue of Life & Style, on newsstands now. And scroll through the gallery below to see how Ashlee has changed over the years.