Tori Spelling says in her new tell-all book STori Telling that her mother was cheating on her dying father.

The former Beverly Hills, 90210 star and her mother Candi fell out over TV mogul Aaron Spelling's will, but recently reconciled after the actress gave birth to her first child last year.

However, their relationship can have more woes due to the book in which she claims her mother had an affair while her father was dying.

Ironically, Mary Jo Eustace was in the process of writing a book My Husband Dumped Me For Tori Spelling, describing how her husband Dean McDermott was cheating on her with Spelling.

Spelling previously mentioned other dirty laundry in her book, such as a fight between former 90210 cast members Shannen Doherty and Jennie Garth.