Tell your wife got appointment or ot , go early take the 1st ferry 8.30am, return 2.45pm, reach sg 4pm only, plenty of time can utilize , or take ferry 5pm reach sg 6.15pm, later win liao can bring wife to go out celebrate nice dinner, if lose then reach sg ask your wife to cook, no worry, but remember to switch off phone , otherwise your wife call u, when u are at indo sea and auto roam indo ine, the ring tone is different, if your wife too smart will notice you are not in sg.