Naked Desires in the Barn 1

Story Excerpt

In a fantasy that Alexis has always had, living close to a farm, with animals she one day builds a perfect way to experience this fantasy first hand that fantasy is to have sex with a horse, not any horse but one named Thunder as she builds a wooden fake mare, built well and made to withstand a horse on top of it, Alexis sets it up and soon goes inside of it, naked and bound inside of it, safe from whatever happens as Thunder mates with it, believing the wooden mare to be a real mare in heat.
Afterwards, Alexis dreams of this and what she has done, and as such what happens in this dream that Alexis dreams of?