Based on what I've heard from family that just got back from Greece, the referendum will come in with a strong majority voting to reject the terms from the EU/E

Based on what I've heard from family that just got back from Greece, the referendum will come in with a strong majority voting to reject the terms from the EU/ECB/IMF, and the loans will be defaulted on. Does this mean that the EU / EMU will vote to kick out GR from their unions? Or that GR politicians will vote to leave EU / EMU ? As much as I personally hope for the entire continent to reject the EMU and return to their own currencies, these things are less clear.