Alex, for a moment, stays flaccid, he is decieved into thinking the voices may be in another sector of the house, in which motivates him to step out of the corridor, and walk towards the kitchen slowly, not noticing both of the individuals due to his strict pre-caution.
"forget, forget.. water." Alex says, hesitating, and opening the fridge of the kitchen slowly, quickly shuffling through the fridge for water.