water in oil

I would guess crank case breather tube deteriorated/cracked

How much water did you take in over the full mark on the stick , was the oil level on the full line before the water go in , was it a vanilla or chocolate colored shake , are you going to flush or split ?

I think vanilla is from more water and harder to flush than chocolate , vanilla creates a buttery icing that gets all over the oil/water line and isn't easy to flush out -------- it is not the water that is the problem , it is the sand /grit /dirt that is in the water ----flushing it out is a hit and miss thing , sometimes it will survive , sometimes it survives but starts the downward spiral , and sometimes it is just doomed