***The Holy Spirit’s role in the Incarnation is not the way you portrayed it.***
I am only stating what the Bible says. Explain it, then.
Jesus didn't receive His divinity from the Holy Spirit. As we state in the Nicene Creed, "begotten not made, consubstantial [in the current "translation," "one in being"] to the Father." This means that Jesus, as the Second Person of the Trinity, is eternal, and is of the same "substance" (meaning, His divinity) with His Father. The Holy Spirit shares in this divinity, because there is only one divinity, one Godhead.
Now, to the verse at hand. It says, "And the angel answering, said to her: The Holy Ghost shall come upon thee, and the power of the most High shall overshadow thee. And therefore also the Holy which shall be born of thee shall be called the Son of God."
St. Gregory of Nyssa explained it this way: "Or he says, overshadow you, because as a shadow takes its shape from the character of those bodies which go before it, so the signs of the Son's Deity will appear from the power of the Father. For as in us a certain life-giving power is seen in the material substance, by which man is formed; so in the Virgin, has the power of the Highest in like manner, by the life-giving Spirit, taken from the Virgin's body a fleshly substance inherent in the body to form a new man. Hence it follows, Therefore also that holy thing which shall be born of you."