Virgin Mother- discontinued

Kaname and Ruka are engaged, even though the vampire council does not like it as they wanted him to marry another pureblood. What the hell?Why is Isaya Shouto's youngest daughter carring Kaname's child? What on earth happened? Howcome Kaname never recalls touching her in that way? And howcome she still claims that she is VIRGIN? Why does Yuki blame herself? What's happening? (AU)