In season 3, Rita suddenly discovers that she is pregnant with Dexter's baby.Believing that being a parent is one of her main achievements, Rita decides to keep the baby, and leaves Dexter's role in the child's life entirely up to him.Rita and Dexter then go to a marriage counselor, who allows them to sort out their problems and instigates peace between them.However, their neighbor, Elliot, begins to fall for Rita, kissing her and pointing out that Dexter is never home.In anguish, Dexter turns to Lila, and consummates what had before been a platonic relationship.After Dexter lies to Lila about working late (he had gone to kill Jimenez), Lila breaks into Rita's house, afraid that they had rekindled their relationship. His breakup with Lila, his love for Rita and her children, and his sincere regret over what he had done convinces Rita to start dating him again.Rita Bennett was Dexter's girlfriend and later wife.Rita is portrayed as a mother, who is slowly recovering from being physically abused by her ex-husband, Paul, and having difficulties maintaining a sexual relationship.
In season two, Rita's relationship with Dexter becomes troubled.Animals do not like Dexter, which can cause noise problems when Dexter stalks a victim with pets.He is quoted as having once had a dog that barked and growled at Dexter until he was forced to get rid of it, and a turtle, which hid in its shell until it died of starvation rather than have to deal with Dexter.This also gives him a reason to continue his relationship with Rita, to whom (as of Dearly Devoted Dexter) he is engaged because of a misunderstanding.
At the beginning of the third book, Dexter in the Dark, it is revealed that Cody is not the only one with dark impulses, as Astor too pressures Dexter to teach her.
Though she initially kisses him back, she quickly ends it before something begins.