The first time you met your 18 year old son's new girlfriend Anna was the night she came over to watch movies for 'family night.'

You and your wife leaft them alone after the movies, assuming they would say good night and she would go home.

 About midnight, you were awakened next to your sleeping wife to muted sounds coming from your son's rom below you. You can hear Anna, clearly having an orgasm.  Moments later, you hear your son having his.

 His was not the only cock shooting cum in your house that night..