Step-mom and son. Keeping him en-femme makes day-to-day life so much more pleasant and there are no rebellion issues. And when she brings her boyfriends home for an evening of lovemaking, she knows her pretty little "daughter" will stay in her room, quiet as a mouse. It's a real turn-on for her to know that her sweet cosseted step-son can hear their lovemaking. She's thinking about installing a peephole so that he can watch and learn as well.
The Secret Desires of a Crossdressing Geek