Scott confirmed Jenner's mom, Kris Jenner, helped deliver Stormi with her own hands. He said the mom-of-six helped ease his fears about the birth.
"She held it down because it was so scary," the star said of Kris. "She walked me through the whole process."
"There's this thing called the placenta, that I've just been hearing about? Oh my God. So, I was fearful of all that. But I cut the umbilical cord," he shared. "But yeah, [Kris] held it down. Mama KJ, she's the best."
The "Sicko Mode" rapper said his anxiety faded once he held Stormi for the first time.
"Going into it, I was nervous and scared, because we're both young," he explained. "But, you know, when you first hold a baby in your arms, it's uncontrollable ... I never thought I could just love something so hard."
Jenner gave birth to Stormi in February. She said a Snapchat Q&A in October that Stormi and Scott have a strong bond.
"They have this crazy connection," the star told fans.
"She's definitely a daddy's girl," she said of Stormi. "It's cute to watch. When dad's around, I'm not even there. It's like she doesn't even see me, but it's cool. Whatever."
Scott and Jenner have been enjoying domestic life and brought Stormi to visit a pumpkin patch for the first time ahead of Halloween. Scott surprised Jenner by filling their house with roses and candles last week.