No, but when Minaka is talking about Minato, and then starts spouting lines about tales of Father and Son, in relation to himself and Minato, you don't need those actual words.
Unless you're retarded. Or a troll.
I mean, I could accept opposition to the Yukari one, because that really is her own assumption, but really.
That first one is pretty damn clear.
When you have had the sheer number of implication that this familial relation has, and several characters are talking about it as though its true, including Minaka , you'd have to be stupid to deny it.