Question about Robey

Amanda must have killed him. That's why his parents are looking for him: they want to find him/his body and send Amanda to jail because of this. However, in the second film (Scorned 2 with Tate McClure), Amanda has married a professor and kills Alex and Melissa Weston. Amanda has nightmares about Robey and their sexual relationships together at the beginning of the film. Amanda is going through psychotherapy because she has repressed her memories of the event, but keeps on getting this nightmares about them both together.