Dreams involving loved ones, particularly those who have passed away, can evoke strong emotions and often reflect our subconscious thoughts and feelings about those individuals and our relationships with them. In your dream, the presence of your grandparents suggests that you are processing feelings related to family, loss, and care.
Your grandmother's end-stage dementia and the tantrum may symbolize feelings of helplessness or frustration either in your own life or in relation to caring for loved ones. It could also reflect anxiety about aging and the changes that come with it. The act of moving into their house indicates a desire to support and nurture family ties, possibly mirroring your own concerns about family dynamics and responsibilities.
The nondescript child in your dream might represent innocence or a new generation, highlighting the cycle of life and the importance of caregiving, not just for the elderly but also for the younger ones. Filling the child's sippy cup could symbolize your nurturing instincts and willingness to help others, even when faced with challenging situations.
Your grandpa’s insistence that he "didn't die" while your grandmother is in distress may indicate unresolved feelings regarding their deaths. It can also symbolize the struggle between memory and reality, potentially reflecting your desire to keep their memories alive despite the pain of loss.
Overall, this dream may be urging you to reflect on your feelings about family roles, the passage of time, and the emotional complexities of caring for others. Consider how these themes resonate with your current life situation and what steps you might take to balance your responsibilities with your own emotional needs.