AceShowbiz -

Words ran rampant over the weekend that Kristen Stewart and Rupert Sanders had a relationship behind their respective partners' backs for months. The story was quickly clarified by Gossip Cop stating the affair "wasn't just once, but it was 'brief' and 'short-lived'."

Leopold Ross, the brother of Sanders' wife Liberty Ross, previously claimed Stewart and the director started their tryst since "the last half of filming and all through post-production, clear into last week." Sources close to the actress and people involved in "Snow White and the Huntsman", however, insisted nothing happened during the filming.

The long-running affair report was fueled by a picture capturing Stewart and Sanders' dinner in May, but PEOPLE reported they were joined by a small group of people including Charlize Theron during the outing at Monsieur Vuong Vietnamese restaurant in Berlin, Germany.

Stewart's affair with Sanders did not only put the director's marriage into jeopardy but also rocked the actress' relationship with Robert Pattinson. The British heartthrob reportedly has moved out of the Los Angeles home he shared with Stewart. A moving van was spotted outside the house over the weekend. It's unclear who packed their bags.

Kristen Stewart and Rupert Sanders Had Dinner in May: