I ask my big bro for a foot rub to ease some tension but the perv can’t help but look up my skirt! The more aroused he gets the smaller he becomes.. right up until I can fit him in the palm of my hand. I let him explore my giant body before tucking him away somewhere nice and safe.. he can keep an eye on my dirty panties while we wait for him to grow back to full size because.. well.. who would get turned on by their little sisters dirty panties right?