Your girlfriend morphs into your aunt.

As your shapeshifting girlfriend turns her back, you hear a soft crack and the slurping and shifting of her transformation. You see your girlfriend's clothes are vanished that reveal whole naked, then her skin is a bit smoother, her hips round out and her ass becomes tight and smooth. Her height reduces significantly and her dirty blonde medium hair pulls into a brown short straight bob hairstyle. As the sounds and moans subside your girlfriend turns to reveal the form of your mother’s sister, which is your Aunt. Her breasts are almost the same size as your mom (E-cups), they're more rounder, perkier, and soft to be touch. Her face is older but still familiar. You can spot tight muscles through her still rather matronly form and your dick is still at attention. "Ahhh..... it feels good to shed some of that mass. Why don’t you say hello to your lovey 'auntie'?" The petite MILF before you asks as she pulls you into the sofa to begin to make out with you. She then takes off your clothes and works her way down your torso eventually nestling your dick between her ripe round breasts and soon sucking on it with her full lips. You finally penetrate your 'aunt' and release a wave of semen into her. She pulls away, her vagina dripping as well before cuddling with you to ask, "Well my sweet handsome boy. Do you like it?"

"Yes, I do, 'auntie'." you reply.

"Teehee, I'm glad you enjoy it." your girlfriend/aunt says as she gives you a kiss on your lips passionately. "So anyway, handsome. Why don't we quickly dress up before 'my sister' could went home and see us in naked body?"

"Yes, ma'am." you reply as you quickly dress. And a few seconds later, you both got your clothes on and then you the click of your front door knob as you both shock that your mom is now home. You both quickly take a deep breath and relax, act cool and pretend to be normal. When your mom opens the door, both of you and your auntie (shapeshifting girlfriend) greet her. "Welcome home."

"Oh my goodness, sis? Y...you're here." your mom surprises. "W...what brings you here?"

"Well, I came here just to see my sister and my handsome little nephew. That's all." your 'auntie' answers as you laughs chuckle that you see the look of your mother's face.

"Well, that's great of you, sis. And hey, sweetie, where is your sister?" your mom asks you.

"Uhh,... let just say that she have to come to her friend's house to practice." you reply.

"I see,... Anyway, now that's you're here, I'll say that I'm going to prepare... wait I have to call my husband first... heehee" your mother says as she runs to the kitchen, with that, you both laugh as you saw your mother's face as she shocks. "Teehee, we got her good, huh?" your 'auntie' says.

"Yeah, I know, right?" you reply.