Chillingworth is pretty much a leech attached to Dimmesdale. Chillingworth is living and thriving off the pain/guilt he is inflicting on Dimmesdale to the point where he can no longer live after Dimmesdale's death.
Hester an Chillingworth were married.
Roger Chillingworth was Hester's husband
their married
Hester meets up with Chillingworth in the prison where she is being held for her public shaming. Chillingworth arrives in the colony and poses as a doctor in order to gain access to Hester and extract information about her relationship with Dimmesdale.
Hester's husband
Chillingworth visits Hester in prison to confront her about her relationship with Dimmesdale and to assert his control over her. He wants to extract information from her and further manipulate the situation to seek revenge on Dimmesdale.
Roger Chillingworth's main objective in The Scarlet Letter is to slowly torture Hester by reminding her of her crime as constantly as he can, the reason for his repeated visits to her throughout the novel.
No, Hester did not love Chillingworth. Their marriage was based on duty rather than love, and Hester's heart belonged to another man, Arthur Dimmesdale. Chillingworth's obsession with seeking revenge on Dimmesdale further strained his relationship with Hester.
Dimmesdale is shocked and horrified when Hester reveals Chillingworth's true identity as her husband. He feels betrayed and manipulated by Chillingworth for disguising his true relationship to Hester. Dimmesdale also feels guilt and remorse for unknowingly being involved in the scheme that has harmed Hester.
To get him to admit that he slept with Hester.
Chillingworth was gone for about two years before Hester cheated on him with Dimmesdale.
Chillingworth asks Hester to promise not to reveal his true identity as her husband to anyone. He does this because he wants to secretly seek revenge on Dimmesdale without anyone knowing his true intentions and relationship to Hester.