She uses body techniques, using her own body to persuade him. Furthermore, she puts herself in a fragile and infantilized behavior using arguments that place her as a victim and place John as the one responsible for her passion. This really convinces John that he is totally persuaded and dominated by her.
In fact, John is also responsible for what happened between him and Abigail. However, Abigail is very manipulative and we should not victimize her.