Friendly exes or rekindled romance?

Liberty Ross' mystery man from earlier this week has been identified as her ex-boyfriend.

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The 33-year-old estranged wife of director Rupert Sanders stepped out in London Monday night with Christopher Taylor, the director of art gallery Museum 32, the Daily Mail reports. The exes walked arm-in-arm to attend The Serpentine Gallery party.

The British model wore sexy leather pants and a large fur coat for her night out on the town with Taylor. She also gave a big smile to photographers as she got cozy with her ex.

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After Sanders, 41, was caught cheating with his Snow White and the Huntsman star Kristen Stewart, 22, in mid-July, Ross has stopped wearing her wedding ring. The estranged couple have two children together, Skyla, 7, and Tennyson, 5.

While Sanders has been staying out of the spotlight, Ross has been trying to embrace it: The supermodel walked in Alexander Wang's runway show at New York Fashion Week on Sept. 8.

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"I was totally terrified," Ross told The Cut at the show's after party. "I hadn't actually been out of my house for seven weeks so I was really anxious. But it felt amazing."

As for her marital status with Sanders, a source tells Us Weekly, "It's too early to tell what will happen with them."

This article originally appeared on Liberty Ross Reunites With Ex-Boyfriend Christopher Taylor!