Beast?

They crashed into a murky time and place
and found a giant’s cave to shelter in
He claimed them as his prey with leering face
Lascivious, the hunger in his grin.

She offered up herself to save the child,
unto the heathen stranger bared her breast
But -- blood he scented on the breezes wild
and left her untouched, breathless and perplexed.

With curdling howl he vanished to the chase
A moonless night in frigid dew they spent
They both feared his return back to that place
But she also feared his abandonment

His virile silhouette appeared next day
She bravely rose to face him, come what may…