"He got a whole feel for fatherhood—holding hands with my son, playing with him, feeding him a bottle," the video vixen turned sales associate tells us.
"He was a natural with my baby," she adds. "By how seriously he cared for my child, it wasn't shocking when we found out a little later that he was going to be a dad."
The boasting doesn't end there. Read on to find out why Erica praises the unwed Kardashian mother-to-be, calling her a "role model."
"The fact that Kourtney puts everything out there about her pregnancy for the world to know makes her more of a role model," Erica said of the 30-year-old E! reality starlet. "It's realistic and it's the truth, and for a young girl going through the same thing—forgetting to the take the pill, considering abortion—it's nice to know Kourtney is someone a person can look up to in the public eye."
Erica also says Kourtney's already-gorgeous look has improved since becoming pregnant. "She has this glow at all times," she gushed. "She adds a new definition to the word beautiful. She's just embracing her pregnancy, and you can tell by looking at her that she couldn't be happier."
And it's nice to know Kourtney's not alone in eagerly anticipating the baby's arrival. Erica added, "Scott is more excited than anyone."
—Reporting by Dahvi Shira
For more Kardashian beauty, check out our Kourtney & Khloé: They'll Take Miami photo gallery.