You wake up mommy because you are wanting some intimacy, first she refuses but it was easy to convince her because she was dying for it, mom starts to fuck you but your sister is just beside in bed, she awakes and start to ask questions, like "what is mommy doing?" "why is mommy naked?" but mom was so angry at her interruption that she keeps telling her do not bother them , mom doesn´t want anyone to disturb this special moment with her son.