You have been waking up thinking someone has been sucking your cock. But after a couple weeks of this you wake up fully and realize it’s not a dream but it’s your mommy. She has been feeling empty and needing to be sexually satisfied. She confesses her feelings and the need to be filled and notices that you are still hard so she starts to suck you off again and tells you she’s going to ride you and you are going to fill her up with your cum.