Allan was staring at Catherine's rented house. He saw Thelma and the kids in the nearby store. He also saw Jerome inside the house watching TV alone. Earlier he saw Catherine talking to Jerome and then left.
The window is wide open, the curtain was parted in the middle of the window, and the door was open. He can see clearly who's inside while pretending to pass by.
He knew that the house only has one room, Catherine must have been in her room right now while Jerome was watching television alone. He continues walking back and forth in the street listening to music on his headphone while glancing at the house every now and then.
All of a sudden he received a call...coming from John!
"Sir, good evening!"
"Allan, what is the situation there at Catherine's house?" asked John.