Liberty Ross Is "Still Processing" Rupert Sanders' Kristen Stewart Fling

Liberty Ross is staying strong post-scandal.

Although the British model, 33, hasn't been wearing her wedding ring since her husband Rupert Sanders, 41, was caught cheating with actress Kristen Stewart, 22, a source tells Us Weekly "no decisions have been made" about their 15-year relationship.

PHOTOS: Kristen and Rupert's affair

The Snow White and the Huntsman director Sanders was photographed engaged in a steamy makeout session with Snow White actress Stewart on July 17. Ross learned of her husband's affair the week before Us Weekly's exclusive photos emerged on July 24.

"Nothing has been filed. It's still too early to tell what will happen," the source tells Us. "She is talking to and seeing Rupert now for the kids, but as far as the marriage she's still processing everything that happened."

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The former British Vogue cover girl shares daughter Skyla, 7, and son Tennyson, 5, with Sanders. The director did issue a public apology to his wife in a statement to Us on July 25, saying, "I am utterly distraught about the pain I have caused my family."

As for the future of their relationship, the source tells Us, "No decisions have been made. It's been very hard on her dealing with this and all the media attention. She is very strong and working through it and keeping private about it."

PHOTOS: Kristen and Rupert's road to infidelity

Ross stepped out on the red carpet Wednesday for her first time since the scandal. Looking stylish in a silky green button-down shirt, Ross smiled for the cameras at the Hollywood premiere of Lawless. The only thing missing from her ensemble? Her wedding ring.

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Liberty Ross Is "Still Processing" Rupert Sanders' Kristen Stewart Fling