"That's fantastic." I gasped.

She swung her hips back and forth a little, like she was dancing to a slow melody. To my surprise, she lowered her panties even more until the entire length of her crack was exposed. I was completely mesmerized and drank in the perfect view my little sister was offering me. She kept moving her hips back and forth and I watched the gentle squeeze of her buttocks as they tightened and relaxed with her swaying.

"Better?" I heard her say, still facing away from me.

I just let out a sigh. She finally looked back. Her face was pretty rosy and her skin was shining....