Bubbly butt of a girl walking with a crutch

Seems like this poor girl injured her leg in some way so she had to walk with a crutch. However, she didn't let that crutch stand in her sex appeal and voyeur was the first to notice it. He tailed her from behind and he saw an upskirt that featured a delightful bubbly ass, with panties nicely tucked into the crack.