Niklas Soderblom to Pen Tell-All About Nicollette Sheridan

Actress Nicollette Sheridan had a bitter rivalry going with some of her co-stars on Desperate Housewives, according to her ex-fiancé.

Niklas Soderblom, a Swedish-born actor and trainer Sheridan dumped in 2005 to reconnect with lame singer Michael Bolton, is out trying to find a publisher for a new tell-all book about Nicollette Sheridan.

He is angry and ready to tell her secrets.

"It was a competition," Niklas Soderblom said of her relationship with co-stars Teri Hatcher, Felicity Huffman, Marcia Cross and Eva Longoria.

"She was a middle-aged woman in Hollywood and deep down I am sure she sees Desperate Housewives as her last big break," he wrote.

"When she landed the role of Edie in Desperate Housewives, it was initially only going to be for a few episodes. She was stressed-out," he said.

But even after she was hired as a series regular and delivered funny Desperate Housewives quotes week after week, Sheridan never felt part of the cast.

"[Nicollette Sheridan] was devastated when posters for the show showed the other four women, but not her... She started crying. She said she was sure the producers intended to ditch her character. She exploded," Niklas Soderblom says.

"She screamed: 'Don't you get it? Haven't you seen the new posters? Teri, Marcia, Felicity, Eva.... but no Nicollette,'"he quoted her as saying. "'Do you get it? No Nicollette. They don't give a -- about me. It's like I don't exist.'"

Nicollette Sheridan and Niklas Soderblom reportedly were involved in a year-and-a-half relationship that started before the series began.

Sheridan, 44, is currently expecting her first child with Michael Bolton, according to several news sources, on the set of the successful ABC show.

So far, she has refused to confirm the reports. Sheridan and the "When a Man Loves a Woman" singer are engaged but no date for a wedding is set.