Your best friend comes over to show you her new bathing suit. She loves it, but she feels a little shy because her ass has grown since last summer. It's huge! You try to console her and then decide to offer some help. You tell her you've seen some videos online where they use oil and a jiggling method to activate quick fat loss. She's willing to try anything and very naive. She reluctantly strips down naked and oils up, then begins starts jiggling for you. She isn't sure why you want her to face away from you, or why you keep getting closer to her ass, and questions the weird sounds she hears, but she trusts you. Soon you bust your load all over her ass, but she doesn't know any better because you tell her it's just the oil.