Staci Silverstone missed out on signing up for the trip to the planetarium, but she really wants to go. Professor Knight tells her that the tickets are already sold out, and there's nothing he can do for her. But Staci's persistent. So persistent that she tells him she'll do ANYTHING to get a ticket. To illustrate this, she pulls her professor's big dick out of his pants, stuffs it down his throat, and then gives him takes out her beautiful natural tits and gives him the best classroom sex of his life! That only happens once in a blue moon... 

 
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