The Snow White and the Huntsman director was seen strolling around L.A. with a wedding band and his model wife had her ring intact as well.
Friends recently told The Telegraph that the pair, who share two children together, were trying their best to let bygones be bygones.
"She is prepared to give Rupert a second chance,” one of Liberty's friends told the paper. “She accepts that it was just one of those silly flirtations.”
Meanwhile, Rob doesn't see the whole makeout session as quite so "silly."
The Cosmopolis actor asked his girlfriend of three years to kindly move her things from their shared home in L.A. this weekend.
"The entire thing has been such a blow to Rob. Talk about having his heart ripped out," a source who knows the couple tells PEOPLE. "Rob just isn't going to be able to get past the cheating – one time or not."
To make matters worse, a Snow White sequel is all but imminent and Rob just doesn't think he has it in him to stomach the two working together again.