Head upstairs

Not wanting to contradict Lauren, or run the risk of seeing what James and Shelly are up to outside, Sam agrees and heads up the stairs, knocking on the twins bedroom door.

After a few moments of silence he pushes the door open to find the room completely empty, no sign of Joe or Phina. He glances first at the bathroom door and then over his shoulder at his own bedroom, the last place he saw Phina was in there, but surely she wouldn't have stayed. Would she?