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POV - step-Mommy didn't know anyone was home and decided she wanted to cum before getting in the shower. She has fun with a toy, only to be surprised by you coming in and watching her. She decides that bulge in your pants means you like what you're seeing. So she tells you to pull your dick out and masturbate with her. After she cums, she opens her pussy for you to look at and imagine while she counts down your time to cum.