"O God! I can't believe this! How stupid can you be? To live with a man you aren't related to in anyway… what if he's a criminal or has immoral thoughts about you? How can you be so comfortable? You even lied to us, your friends, to me."
Towards the end, his voice was reduced to a whisper. The idea of her living with an unknown man infuriated him and he was having a hard time keeping his temper in check.
On the other hand, hearing him assume Carl was a criminal pissed her off. She thought, "What criminal? What immoral thoughts? Considering they were married, if indeed he has those thoughts then they aren't immoral."
She clenched and unclenched her fist. With gritted teeth, she managed to say, "Don't you dare say that."
How could he say those words without knowing Carl. She trusted him enough to know he wasn't a criminal.