There goes the Sunny. Although Sandra Bullock seamlessly assumed the role of mom to stepdaughter Sunny while married to Jesse James, the Proposal actress has since cut ties with her daughter by proxy. Sunny's birth mother -- porn star Janine Lindemulder -- tells Us Weekly that the movie star has turned a blind eye to the girl she helped raise from 2005 to 2010. Despite the fact that Bullock has removed herself from Sunny's life, Lindemulder says there are no hard feelings. Lindemulder tells Us Weekly, "Sandra doesn't communicate anymore with Sunny. Sunny never talks about her. I don't bear any grudges against Sandra. She has her own son [Louis, 19 months] to raise." Unfortunately, Sunny just happened to be a casualty of Bullock's war with ex-husband Jesse James. An insider tells Us Weekly that the only way the actress could "move on" from James was by removing all aspects of James from her life. Says the source, "The last thing she wanted to do was hurt Sunny. But she had to do what was best for her." Since the split, Bullock finalized her adoption of 19-month-old Louis Bardo and has recently been seen taking a hike... with none other than Hollywood hunk and Proposal co-star Ryan Reynolds.