List of Dexter characters
On a visit to his sister, Dexter and Debra both feel as if they have been drugged; just before he passes out, Dexter sees Hannah standing over him. When he later regains consciousness, Dexter begins investigating Hannah, and finds that she has changed her name and married Miles Foster (Julian Sands), a wealthy businessman. Dexter goes to see Hannah, who says that she had wanted him to kill Foster, but changed her mind after realizing she is still in love with Dexter. Foster warns him to stay away from Hannah, and has him beaten up. Dexter goes to Foster's boat to protect Hannah, but finds that she has already killed him. The two of them dispose of the body, and promise to watch out for each other. The two end up having sex and rekindle their relationship.
Dexter (season 2)
Meanwhile, Dexter's relationship with Lila becomes closer as she shows him how to accept who he is. When Rita discovers Dexter spend an evening in a hotel with Lila, she breaks up with him and Dexter ends up sleeping with Lila for the first time. Dexter learns that Lila is a pyromaniac, at one point purposely setting fire to her apartment and feigning innocence to draw Dexter back to her. When she starts to follow him obsessively, he takes measures to distance himself from her, eventually foregoing their relationship. Realizing he is developing genuine connection to Rita and her children Astor and Cody, Dexter returns to them. Lila is furious and begins to track Dexter's movements, while also dating Detective Angel Batista. Dexter warns Batista that Lila is not to be trusted but he dismisses the concern. Later, Lila brings rape charges against Batista and tells Dexter she'll drop them if he returns to her. Debra investigates Lila and finds that she is in the country illegally, threatening her with deportation if she doesn't leave Miami.