Water in Engine after radiator top hose went

First the top of the plastic reservoir had a crack and we replaced it after the engine over heated on highway. Drove for 4 kms and the top radiator hose busted and was replaced after engine cooled down for 12 hours. Then drove 13kms and engine was performing well. The vehicle was then parked and 2 hours later, engine would not start and we found water in engine oil. Please help out by providing possible causes.

The car is in Indonesia , it said that it is a 1997 S70R but it may be a 1998 for American model reference. Many Thanks!