United Kingdom, Oct. 30 -- Katherine Schwarzenegger thinks being a stepmother, as well as a mom, is a "blessing".

The 35-year-old author has daughters Lyla, five, and three-year-old Eloise, and son Ford, 11 months, with husband Chris Pratt and thinks it is "wonderful" that she also has a role to play in helping the Guardians of the Galaxy actor and his ex-wife Anna Faris raise their 13-year-old son Jack.

She told People magazine of her relationship with Jack: "I've learned so much and continue to learn so much. Just like parenting, you learn something new every single day.

"It's a blessing for me to be able to be in the role of a parent and also a stepparent.

"A lot of people aren't able to do or experience both. I feel really gratefu...