John Proctor’s fear is that his 6 month affair from the past with Abigail Williams is going to come to the light, and that his wife Elizabeth Proctor find out that he was committing adultery. From the text, In the kitchen scene when Mr. and Mrs. Proctor were arguing and he was becoming defensive so quick, he was low-key defending Abigail as Mrs. Proctor asked for him to tell on Abigail about her lying that everyone was committing witchery in Salem,