...Ms. Morgan Miller, our homeroom teacher.” you say shyly.
“Ooh, I like the sound of that. I bet you like something hot for teachers, huh?” Your girlfriend states as she clambers on top of your dick.
As you begin thrusting her moans become lower and huskier, her hips widen pressing her now beautiful, heart shaped rear into your groin. Her stomach tightens into a firm six pack and her nipples enlarge and breasts swell out to a hefty D-cup. As your girlfriends face begins to pop and change shape, her brown hair becomes thicker and brightens into a sexy blonde shade as it grows down to her waist and tying itself into a headbun. Your girlfriends formerly dainty round face has formed into your hot teacher sharp, sexy face with a glasses on it. Finally slight muscles fill out her arms, back, and legs as barely noticeable wrinkles work their way into her skin.
Now your girlfriend is completely a woman who you calls her Ms. Morgan Miller, she shouts,”Keep it up, just a little more that you're finished!” Upon which you release your semen.
“Well you lasted much longer than I ever thought. What do you say we make this lesson a little more advanced?” Your shapeshifting girlfriend in your hot teacher's body says as she cuddles up next to you.
Picking up her role playing queue, “Oh, I would love to see what you going to teach me, Ms. Miller.” Grabbing her by the ass and pulling her in for a kiss.
“So, what do you want me to teach, some more sex education, or some 'homework'?” She says, holding your face in her hands.