Liberty Ross finally files for divorce following Rupert Sanders affair with Kristen Stewart

Liberty Ross finally filed for divorce from Rupert Sanders in Los Angeles County Superior Court Friday following highly-publicized cheating scandal with Kristen Stewart six months ago, according to TMZ.

Liberty Ross, 34, who is represented by lawyer Laura Wasser, has asked for spousal support and joint custody of their children – 7-year-old Sykla and 5-year-old Tennyson, TMZ reports.

Rupert Sanders, 41, represented by lawyer Lance Spiegel, has reportedly filed his response to the petition in which he also asks for joint custody.

The director has also requested that he and the British model split the court costs between them.

Liberty Ross and Rupert Sanders’ 9-year marriage has been under strain ever since his explosive fling with Snow White and the Huntsman starlet Kristen Stewart was exposed by Us Weekly in July 2012.

Unlike Rupert Sanders, 22-year-old Kristen Stewart seems to have managed to patch things up with her boyfriend Robert Pattinson.

Liberty Ross was believed to have initially kicked the cheating director out of their home after his infidelity was revealed, but they began couples therapy in an attempt to save their marriage.

A source told RadarOnline in September: “It was Rupert’s suggestion that he go to therapy with Liberty. He will do anything to save his marriage because he loves his wife and knows he screwed up.

“Rupert is willing to do absolutely anything and everything he can to save his marriage, he knows this is the worst mistake of his life, and he cannot believe he was so stupid.”

The source added: “The thought of losing his wife and children, who he loves more than anything in the world is killing him.”

Liberty Ross and Rupert Sanders have not been publicly seen since they went trick-or-treating together in Los Angeles for Halloween.