United Kingdom, Aug. 8 -- Anna Faris struggled with fitting in the moms of her son's friends.

The 49-year-old actress feared that she was "doing something wrong" as a parent to her and her 47-year-old ex-husband, actor Chris Pratt's son, Jack.

She explained to E! News: "I didn't always feel like I fit in with the mothers of the parents of his friends. I always felt like I was kind of messing up somehow. I know I'm doing something wrong here."

Anna's worries have been eased by how well Jack, 13, is doing, and that he "knows a whole lot more than I thought he did".

The Scary Movie star added: "I am proud that he has a deep sense of justice, and I find him just fascinating."

Although Anna once questioned whether she was "fundamentally w...