The hosts' body was imbued with the eldritch energies emanating from the writhing mass growing in her womb. Belly swollen and stretched almost to bursting point. Breasts, veiny and engorged with maternal lactation.
The mother would the first mortal in eons to carry the spawn of the ethereals.
The gestating celestial offspring alters it's carriers' physicality to optimum levels for peak nourishment and sustenance.
The birthing event would be an almost unimaginably orgasmic sensation.
Veiny alternative*