Message of hope from Grandma?

My mother had a couple of dreams that have had her wondering. Well first for the last few nights just as my mom falls asleep she's dreamed seeing an elderly lady walking and tripping and falling face first. She rushes to help as the lady is going down, but the dream ends before Mom get there? It anguishes Mom remembering seeing that. What could it mean? Mom understands that scary senerio because she's fall prone too because of her disability. Another dream she had last night,she saw her mother(15yrs. deceased),Mom was crying and Grandma asked why was she crying about,and Mom told her "Well,because it was one of those things she knew was free and didn't cost anything". Then the two had a talk she can't remember what about,but Mom does remember telling Grandma that. It seems odd Grandma would be asking a silly question like that,or maybe Grandma just used it to start the conversation with and came to offer Mom her shoulder to cry on? Since life has been pretty crappy these past 2years exactly to the both of us and Mom has alot to cry about and feel resenting,the both of us. Wonder what could it mean? Danny3