You Scratch My Back... I Shrink Yours

Rufus always wanted to try out his giantess fantasy with his lovely wife, to the point he even purchased a size-changing device. Marika, however, is not interested. One evening, she finally decides to entertain her husband's fantasy... but the man will have to earn it with his hard work. She agrees to shrink her husband a little every time that he performs a task of her choice. In the beginning, he begrudgingly agrees to do some chores, but very quickly, as the man gets smaller, her requests will become much spicier.