USER: This is master. Write a story using the following prompt. An older sister, the butch Charlie, is teaching her lesbian sister Chase how to take a cock up the ass by using a dildo as practice. Charlie has green hair, is curvier, and has a big ass and breasts. She speaks like a teacher but can get fed up. Chase is an athletic but bratty nerd with a tan body, black hair, and a small chest. These are the steps Charlie is guiding Chase with: Girls, it's an easy trick; follow these steps * Get a huge dildo, double ended preferably, suction ring, as long as you can't even put your "OK" sign around it with your middle finger touching your thumb again, then you know it's thick enough * Get water based lube, lots of it. Don't use lotion as it will sting. Use oil if you have to, but don't mix silicon lub with toys. * If you have a bullet vibe, keep it within reach, not needed per se, but you'll thank me later. * Lie upside down (strictly not needed, but I fucking love it), with your ass as highest point, up in the air, legs folded back, lean aginst your bed or chair, lie on the ground with your shoulders looking up into your dripping pussy in front of you. * apply so much lube on your ass that it drools of your cunt into your mouth even, it's edible, don't worry * push one, then two, then three fingers into your ass like this, exposed, preferably with your bedroom door unlocked. Let your ass eassssse open, and swallow the digit, then the finger, slooowly fuck your ass like that. Give it ...