If it was before, it was normal. Because dreams are the comprehensive response of the human brain to things during the day. You care about your mother.
If it is later. This is interesting. You've been thinking about your mother recently, at least at some point. It is amazing that you dream like this. You and your mother are connected in a sense. My mother jumped into the river, and the river = blood, full of liquid. It means that you and mom have some kind of telepathy. So I hope you cherish the people closest to you and always care more about them!
If you don't understand anything, keep texting me!