Hey there @Dye_Ella
I'm not sure on the specific reason why this dream happened. But there could be some factors that caused this.
One of which is dreams combining exisiting memories and people that you have and know. Because most of the time, dreams are made from previous experiences and memories you had in life.
Another could be explained through Expectation Fulfillment Theory. The theory suggests that dreams are utilised as a vessel in releasing emotions and feelings that couldn't be expressed.
So from the factors, your dream might have been caused by a mix of pre-exisiting memories and some unexpressed feelings.
I'm not sure if this would clearly explain why the dream occured, but I hope this helped!
