Dark hair is a dominant gene and Blonde hair is a recessive gene.
So while it's possible for a child to have blonde hair when one of the parents is blonde, it's literally impossible when both parents have dark or brown hair.
Look at this faggot trying so hard not to get double cucked.
In all seriousness tho, that's Kayo's mother's hair.
Le ebin memelords had been waiting for this moment ever since the show started.
I COULD FEEL MY HOT MEMES GUSHING DEEP INTO /a/ AS SHE TREMBLED IN YET ANOTHER NTR THREAD. TWO MONTHS WORTH OF SHITPOSTS MADE A GLOPPING NOISE AS IT FLOWED ENDLESSLY INTO /a/.