What are some of the ways in which Mrs. Marwood is able to manipulate the men around her?

Mrs. Marwood seems to enjoy manipulating the men in her life. She likes to torture her husband by cheating on him which he is unable to prove. She easily manipulates her lover, Fainall by threatening to reveal her affair to his mother-in-law Lady Wishfort. She also claims that Fainall is spending her money and wrecking her reputation. This causes Fainall to protest that he only married his wife for her fortune and he will divorce her and marry Marwood.