He looked through all the tapes to find one that would... well... spice things up.
Going through the covers of tape after tape, he narrowed it down to any that had any anthro transformation. Even then he had to narrow that down. Again. And again. And again. Finally, he found the tape that he would play on the Walkman.
"Change the individual into a loving pig person"
He gently paced the tape in the Walkman, closed it and pressed play. He crept away into the guest room so he can safely sleep there.
The tape already soothed Amy in a good mental state, so from there, it was only just a matter of time until the tape started playing the changes.
"When you wake up tomorrow, you will feel hungry... so hungry... you must have a lot to eat... you need to have a lot to eat... you must get into a shape that is... more comfortable..."
Amy smiled, the words going into her mind, ready to wake up tomorrow and start the day as someone different.
"You love your partner... and he wants you in a rounder shape... must have a big body... a good pig must have a round body... you must be a good pig partner... remember... good pig..."
Amy continued to sleep through the tape, her mind now abuzz with orders...