They say that grandparents tend to like their grandkids more than their actual kids...and For Kenny this might be the case even if technically he's just Levi's uncle

Levi never gave anyone any indication he had a kid, especially to Kenny but It didn't take long for Kenny to find out Levi had a kid

And now you were standing face to face with Kenny on the rooftop

Kenny: "So you're Levi's brat huh?" Kenny spoke in his southern accent