As Mike gorges on your cock, your dildo familiar speaks to you.
"Master Equus this is a an opportunity to expand your power. Take note
of the human laying beside me. He has taken your seed vicariously, so
until you decide what to do to him, he will retain his free will but
his genitals will take your influence."
The thought of his cock changing made your own drip with corrupted
equine pre into Mike's mouth, and you smiled as you saw Tom's pants
tenting as he lay there unconscious.
"The one servicing you has already lost control over himself and is
gradually losing his mind to your dark taint. Now Equus, with the one
laying here you can only taint him further within a room's radius but
your power can grow beyond that. You can change them either into full
donkeys which will add power to your corruption and lust or make them
soul-tainted donkey monsters that can serve as minions to you."
This is way more interesting than you though. Mike makes your hoof
stomp as you fire another load down his throat, and see that his ears
have grown tall and furry.
"If you don't decide before you leave the presence of the one
servicing you he will just turn into a donkey. So what will you do
Master Equus?"