There was a period of silence, Sophia, Felix and Stella were busy in their own thought.
Felix felt the silence pressing on him, making him aware of guilt he feels for keeping from Sophia that the 'small robot' is his invention. Felix looked at Sophia and glanced at Stella nervously. "There is one more thing..."
Sophia looked at Felix curiously waiting for him to speak.
Felix told himself that he has to say this and continued, "The device you call 'small robot' is actually MX31. It is one of my designs that I didn't finish."
"What are you saying?", Sophia was not sure she heard him right. Stella squinted her eyes and listened without making a sound.
