Shaw the originator of the Xenomorph

I had a thought last night while looking at the Prometheus trailer again. Perhaps Noomi Rapace (Shaw) becomes impregnated by the SJ's, either accidentally or deliberately and through an accelerated pregnancy gives birth to either a small Xenomorph egg, which grows on board the SJ's ship, impregnates an SJ, the ship crash lands on LV426 and is then found by the Nostromo crew. This would mean that the perpetrator of the whole Alien universe would be a Human Woman!