Hello Hannie,
Thank you for sharing your dream with us. It sounds like it caused you great distress. It wasn’t clear if your parents are currently dead. Please take everything to the Holy Spirit as He Alone gives the accurate interpretation.
Perhaps God might have been showing you the status of your parents’ marriage and that there was/is a “third” person in the marriage that caused death/distress to the marriage. This third person could have been a literal person or a demonic/illness influence of some sort.
I hope the Holy Spirit clarifies for you and bring healing and closure where it is needed.
Shalom!