❤️ I instantly felt your Mom had placed her hand over her heart to let you know she loved you and to warn you to take care of yourself ( heart matters, grieving, loss, family dysfunction) for a challenging time.
There are soul boundaries that should not be crossed, including telling someone about their future. It has to do with permission and you did not ask your Mother to tell you. She mostly like did not have permission to tell you or she would have done so.
The water running is key. Water = life. Running out of water (life) and you turning it off would not change the outcome. For your Dad or your brother. They are responsible for themselves and their lives.
Dreams are our connection with the afterlife. She was loving and kind to warn you and used symbols to direct you. You trusted your instincts to follow the trail she laid out for you. That's how respect is given to souls, departed and here on earth.