Sandra Bullock is No Evil Stepmom!

Like many women, Sandra Bullock, 44, has longed for a child but has not yet fulfilled that dream. Now, the actress — who will soon appear in the comedy All About Steve — will become a full-time mother to 5-year-old Sunny, her stepdaughter with husband Jesse James, 39.

Already close to Sunny — the two are often seen at the playground — Sandra takes on this new responsibility under difficult circumstances: On March 10, Sunny’s mother, former adult film star Janine Lindemulder, 40, will head for federal prison to serve a six-month sentence for income tax evasion. While Janine is behind bars, an Orange County, Calif., court awarded temporary full custody of Sunny to Jesse.

“Sandra will be fantastic as a full-time mom,” says actor Denis O’Hare, her co-star in her upcoming film The Proposal. “Jesse’s daughter is lucky to have Sandra in her life.”

The role of stepmom is not new to Sandra: She’s also close to Jesse’s two older children, daughter Chandler, 13, and son Jesse Jr., 10, from his marriage to Karla James.

“If the court gave Jesse James custody of Sunny, well... that’s her daddy. He should take care of her,” Janine’s aunt, Marjorie Lindemulder, tells OK!. “I just hope and pray for everyone involved.”

As for Sandra, the challenge appears to be a blessing. “I don’t see the difference in having blood-related kids or children who come with your husband,” she said last

spring. “I am very blessed.”

For more news on Hollywood couples, pick up the new issue of OK! — on sale everywhere!