In Ceres celestial legend is yuuhi the father of aya's child and not touya is this true?

In Ceres celestial legend is yuuhi the father of aya's child and not touya is this true?
no, it is said in MANY episodes that Touya is the father of Aya's child. Yuuhi is only going to take care of Aya and the child, when Touya dies.