Because she knew john.
if John Proctor had not had an affair with Abigail, then...
they died.
Abigail wants to have sexual intercourse with John Proctor, so she sleeps with him.
Abagail : Her desire to be John Proctor's wife & for Elizabeth to be gone Betty: Abby's influence not just abby's infuence
John Proctor had an affair with Abigail Williams.
Because it would ruin Abigail from getting John Proctor, which later didnt happen anyways.
if John Proctor had not had an affair with Abigail, then...
they had an affair.
they died.
Abigail was having an affair with John Proctor.
Abigail wants to have sexual intercourse with John Proctor, so she sleeps with him.
John Proctor was 60, and Abigail Williams was about 11.
Abigail tells John Proctor that she is in love with him, and wants them to leave Salem and John's wife, Elizabeth.
John proctor affair was exposed by his wife. Abigail was working at the proctor's home and thus is how the affair started. Elizabeth fired Abigail and since John proctor was caught he ended the relationship.
Abagail : Her desire to be John Proctor's wife & for Elizabeth to be gone Betty: Abby's influence not just abby's infuence
John Proctor had an affair with Abigail Williams.
If your question pertains to The Crucible, then Abigail would have been John Proctor's help or the help for his wife around their house. Abigail and John Proctor seemingly had a relationship that he eventually wanted to end,but Abigail did not.