Elizabeth Proctor in "The Crucible" did not directly contribute to the affair between her husband John Proctor and Abigail Williams but instead, it was Abigail's own manipulative actions that fueled the affair.
In this story, Abigail harbored resentment towards Elizabeth and sought to replace her in John's life. In Act I, Abigail admits to John that Elizabeth dismissed her from their service because of her affair with John. This revelation hints at Abigail's motive for revenge and her desire to eliminate Elizabeth as a romantic rival.
Abigail's cunning nature is evident in her attempts to frame Elizabeth for witchcraft. In Act II, when Elizabeth is accused of witchcraft, John confesses to his affair with Abigail to prove Elizabeth's innocence.
This confession that was driven by Abigail's vengeful actions ultimately strains the Proctors' relationship. Elizabeth's apparent coldness towards her husband, suspicious of his motives for revealing the affair, adds a layer of tension to their marriage.