On the domestic front, the affair leads to a breakdown in trust between Elizabeth and John Proctor. John had always been such a good husband, yet now he's been exposed as an adulterer. Elizabeth doesn't know if she can truly trust him anymore. If he could cheat on her with Abigail then why not with someone else?
The most serious consequence of the affair, however, is that it gives Abigail an excuse to exact a terrifying revenge on John and Elizabeth. Abigail didn't want the affair to end, and when it did, she felt like she'd been discarded like a piece of trash. Furious at how she's been treated by both John and Elizabeth—the mistress of the house fired Abby after the affair came to light—Abigail sets out to destroy the Proctors.
Later on in the play Elizabeth will try to defend her husband's reputation by openly denying in court that he had an affair with Abigail. It's a complete lie, of course, but one that Elizabeth hopes will ensure that the Proctors' good name will be...
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