Cynthia Isn't Real, But I Am!

I was trying to wreck this boss fight when my step-aunt jumps in my line of sight, blabbing away. I tune her out until she says Cynthia—my pocket pussy—and suddenly I'm all ears. Apparently she's angling to be the "cool" step-aunt. Then she hits me with, "Show me how you use her," and that was the coolest fucking idea she'd had all week. She watches me roll the silicone down my hard-on and her eyes go wide. She asks if she can drive, so I let her jerk me off with it. She's mesmerized by every stroke. The awkward silence is almost heavier than the sound of lube and rubber. Polite as ever, I ask if she wants a taste. Zero hesitation—she dives down on my cock like she just found clearance sale on cock. Next thing I know, she's straddling my chest, her fat tits swinging, smacking me in the face with every bounce. My hips jerk in response and she lines me up, sinks down onto the real thing. I get her on all fours and the view of that juicy ass—perfect. I flip her after that and mount her proper: her big MILF tits shudder with every slam. When I fill her pussy it's one long moan—then she wants a promise that I'll ditch Cynthia. Give me a break. She wanted cool aunt, remember? Anyway, back to grinding.