Spilling of Water
Scholars have said that if water spills but the cup remains intact, the dream may indicate the mother's safety and the child's death. It was also said that the breaking of a cup might symbolize the death of the server, and a glass cup may point to the revelation of hidden matters.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.