Tori Spelling feels "guilty" about being a working mother.

The 38-year-old actress - who has children Liam, four, and Stella, three, with husband Dean McDermott, and is pregnant with her third - admits she finds it hard to juggle parenthood and a career and questions her ability constantly.

She said: "I'm scared of screwing up my kids. I thought that once we were out of the baby stage, parenting would be a breeze. You just feel at every turn like, 'Whoa, am I making the right decisions, setting the right boundaries?'

"There are days when I struggle with wanting to be a full-time, stay-at-home mother, and feeling guilty about that because I work. One parent at school recently said, 'Oh you never go to anything.' That hit me really hard."

Despite questioning her own abilities, Tori is hoping to install a sense of self in her children, something she claims she never hard until the age of 30.

She added to Parenting magazine: "I wasn't truly comfortable with myself until I was about 30. I spent so much time and energy wondering if I wasn't worthy, and trying to find people to validate me, instead of validating myself.

"When I think of what my greatest wish for my kids is, it's for them to know who they are, and be proud and confident before 30."