Crazy story my grandmother told me today, is it real?

guys everything i will say would be 100% real as told by my grandmother , this story is from the starting of the 80s, my grandmother was in a boat with her family ( there were various other families there too so around 6 boats all together ) they were sailing over ganga mata. one of them was a elder cousin of my grandmother, she had a child of age 5 years with her, that child was creating some nuisance so out of frustration she said " shaant hoja varna ganga maiya mein dal dungi" then all of a sudden waves started coming, and acc to her all 6 boats were on the verge of sinking, the guy who own the boat started shouting that ganga maiya has accepted this child, and what not, the women started crying as the boat guy started stealing her son, all family members also were pushing , in the end the owner of the boat threw that child to the river, and as said by grandmother all of a sudden all waves gone, the river was again normal. guys is this real or something else behind it? ps- i dont know the details, as what the husband was doing, aftermath etc, i will try to ask her again sometime for the details