Taking pride in knowing Eden and Savannah, her 3½-year-old twin girls are leading carefree lives, Marcia Cross intends to keep it that way.

Even while, Tom Mahoney, the Desperate Housewives star’s husband battled cancer last year, she says they never once considered telling their daughters.

Cross, 48, told PEOPLE at the ‘Stand Up For Cancer’ telecast in Los Angeles Friday, there seemed to be no point in telling the children, as being so young, they did not pick up that things weren’t normal. They were simply enjoying their life, and since their father was fine now, it was time to move on.

With considerable improvement in her husband’s health, Cross believes she is in a good place, feeling blessed to have great kids, work that she loves and a really fantastic husband. As she said all her dreams have come true.

has improved considerably, Cross says she is at a good place in her life. "My kids are great, work is great, my husband's really, really fantastic," she says. "I'm very blessed. All of my dreams have come true."

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Cross is an advocate for many charities, but her work with ‘Stand Up to Cancer’ has taken on particular significance since her husband’s diagnosis of cancer in 2009. She will appear in PSAs for the organization’s 2010 telethon, alongside Adam Sandler, Denzel Washington, Stevie Wonder, George Clooney, Gwyneth Paltrow and Renée Zellweger.