Pregnant Kim Kardashian has shared her parenting fears in a touching online tribute to her own mum Kris Jenner on America's Mother's Day (12May13). The reality TV star is due to give birth to her first child with rapper beau Kanye West in July (13), and admits that she is "nervous and anxious" about impending motherhood. But despite her nerves, Kardashian is excited to be a mother as she is convinced she "learned from the best" - and she took to her blog on Sunday (12May13) to heap praise on Jenner, as well as her grandmother MJ and sister Kourtney. She writes, "As I'm counting the days until I finally get to be a mother, I'm a bit nervous and anxious but also excited knowing that I learned from the very best... Motherhood is a gift and I know after watching my mom do it, it's not easy especially when trying to balance a career. I'm honored to follow in her footsteps and make her proud like I am of her. "Kourtney, my sister, best friend, and mentor has also taught me so much about motherhood from being the most incredible mom to Mason (three) and Penelope (10 months). She is super woman with her ability to effortlessly balance work with taking care of two amazing kids and I am so lucky to have her as my guide and confidant as I too become a mother. "And also my wonderful grandma MJ, such a strong and inspirational woman in my life! I love you so much!"