Who read The Mousetrap help me please: In Act Two, Mollie is distraught

In Act Two, Mollie is distraught by all the suspicious clues that are making her question even her own husband’s integrity. She describes her feelings in the following passage, “That’s what happens in a nightmare. You’re somewhere in the middle of friends and then you suddenly look at their faces and they’re not your friends any longer they’re different people just pretending. Perhaps you can’t trust anybody—perhaps everybody’s a stranger”. Draw a diagram of how the nightmare developed in The Mousetrap. Is the audience affected by the nightmare as the characters are? How does Christie plant doubt and suspicion in the minds of the characters, through actions rather than words, so that those seeing him or her are suspicious?