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Your Step-Mommy is away, but her best friend has offered to watch you and babysit. You're shy around her. You've always thought she was hot. She's tucking you in, getting ready to turn out the light when you suddenly stop her. You don't want to be in the dark. You're scared. You're nervous to confess, but eventually you tell her all about the monster in your room.
She laughs softly, sweetly telling you there's no such thing. But she can see you're scared, so she tells you she will find this monster, and make sure it goes away, and never bothers you again. Except the monster isn't where she thought.
She pulls back your sheets to reveal your huge boner, your big veiny scary monster cock. She's shocked. She can't take her eyes off your dick. But she made you a promise, she will make the monster go away, and she will use her special holes to make everything better. She's a horny milf who sucks and fucks until you cum inside her.