Dean McDermott and Tori Spelling with their kids

Dean McDermott and Tori Spelling with their kids

Tori Spelling's new reality TV show, 'True Tori,' will focus on her marriage troubles.

The 40-year-old actress, whose husband Dean McDermott checked into rehab for personal issues in January after he was accused of cheating on the former 'Beverly Hills 90210' star, began filming a six-episode Lifetime series in Los Angeles on Monday (31.03.14) and, according to the official press release, she "has made the courageous decision to allow the audience to witness the most difficult and unpredictable period in her life."

A source told gossip website RadarOnline.com: "There's no telling yet how the show will pan out and how much drama there will be since they literally just started filming this morning."

Another insider told PEOPLE.com: "She once said she would never split up her family, and she seems to mean it. However, after the latest cheating rumors, Tori must have put her foot down. She likely gave him an ultimatum."

The show is set to premiere in the US on April 22.

Tori and Dean have four children, Liam, six, Stella, five, Hattie, two, and 18-month-old Finn, but a source recently admitted the star isn't sure whether she can save her marriage.

The insider said: "Tori keeps waffling. Even if they reconcile, it's going to be hard to trust him," but added: "Tori doesn't want her kids to grow up without their dad in the house."

The couple are also said to be battling severe financial issues but Tori previously denied they were "broke."