Time to leave. Rufus thought he now had to return to the hospital to see his mother and demonstrate his devastation at her death. He couldn't do anything about finding Mac right now, but knew he'd programmed Mac2 with a feature to find the whereabouts of its clone.
Quickly changing his outer clothes to avoid recognition at the hospital, he told the PC at home he'd been sick over the others.
At the hospital he put on another tour de force as he wept for his dead mother. In reality, pragmatic Rufus had moved on. No point in looking back.