After Theresa finally gave up on Ethan, Ethan became upset and very jealous of Jared Casey. When Pilar (Theresa's Mother) was shot Ethan went to see her, she told him to leave Gwen and go be a family with Theresa, Little Ethan and Jane. Later on, Theresa and Jared were staying at the same hotel as Ethan and Gwen. Ethan accidentally crawled into Theresa's bed. They were both drunk and he thought that she was Gwen and Theresa thought that he was Jared. They ended up having sex. Not long after the two knowingly began a short affair. Ethan always admitted his love for Theresa, and he was convinced that Jared was a criminal (but couldn't prove it to Theresa).