Koichi question about childhood friends dug up old memories from Kaname; from when Koichi was a volunteer teacher at Kaname's kindergarten and his first love rival.
That's not something you should say to your son.
Eso no es algo que deberías 
decirle a tu hijo.
Eso no es algo que deberías 
decirle a tu hijo.
Isso não é coisa para dizer ao seu filho.