1995 Nissan Maxima Vehicle Trouble

My car won't start, it stopped on me on the road, got a jump start & it started right back up then it killed did not run hot or at least it did not register hot After trying to get a second boost it would not turn over, while trying to get a boost my father noticed water was flowing out of the tail pipe like a hose & it still would not turn over. The alternator is practically brand new (a year old) The starter is about 6 months old Could you please give me some information on what's going on Thanks!