Baby Boy on the Way for Cassandra Jenner Marino

04/05/2016 at 07:45 PM ET

The Jenner baby boom continues: Caitlyn Jenner‘s eldest daughter is pregnant.

Cassandra Jenner Marino is expecting her third child — and first son — in October, she confirms to PEOPLE exclusively.

“I feel very blessed and excited,” the interior designer, 36, tells PEOPLE.

Cassandra Jenner Marino pregnant expecting son
Nadine Bosurgi

The mom-to-be and her husband Michael Marino are already parents to daughters Francesca, 6, and Isabella, 4.

Marino’s baby boy will be in good company: His uncle Burt Jenner announced in December that he and his girlfriend Valerie Pitalo are expecting a son. And Marino’s half-brother Brandon Jenner welcomed his first child, daughter Eva James, with wife Leah in July.

— Anya Leon with reporting by Raha Lewis

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JessinSeattle on

Awww! What a beautiful photo. She really looks like her mom.

Guest on

Wow, she looks so much more normal and classier than the more famous Jenners!