A year after their brief separation, Sharon and Ozzy Osbourne have renewed their 35-year-old wedding vows.

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According E! News, the longtime couple held a small ceremony in Las Vegas on Mother's Day, which Sharon documented on Instagram, writing, "The best Mother's Day ever!"

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"They are obviously used to doing everything in the spotlight but made a conscious decision to keep this quiet," a source close to the couple said, according to The Sun. "It was just an intimate family get-together at the hotel with their children and very nearest and dearest there."

The vow renewal comes after Ozzy Osbourne temporarily moved out of their house this time last year following an affair he allegedly had with a celebrity hairstylist. Earlier this month, Sharon Osbourne explained how she was able to fall back in love with her husband despite their conflict.

>> Related: Sharon Osbourne explains how she was able to fall back in love with husband Ozzy after his infidelity

“He was trying so hard to be a better person -- desperately trying, working his program, working with his therapist every day and trying so hard,” Sharon Osbourne said to host Julie Chen on “The Talk.” “I just had a newfound love ... I respected him, because he’s seriously trying to be a better person.”