She immediately ran out outside and puked upon hearing the news, putting together that Dexter was actually the Bay Harbor Butcher, and that he must have set up Doakes to take the fall.Trying to counter-act her disgust, Dexter revealed that their dad Harry taught him the code and knew his secret too, cementing the fact that pretty much every male figure in her life has done her wrong in one way or another. Hall and Jennifer Carpenter for great acting in these gut-wrenching scenes.In Season 2, Deb became romantically involved with the much older Frank Lundy.It wasn't the age difference that was the problem — it was that Debra was forced into another "inappropriate" romance, so soon after her relationship with the Ice Truck Killer.He is also well known for his trademark fedora hat which he is almost never seen without.

What do you do when you've been single for five minutes?

The fact that she acknowledged her bad choices in men didn't make this any better, and the pattern has continued throughout the series.

Another pattern the series has had a hard time avoiding: an outside character finding out that Dexter is a serial killer and going along with it.

He thought Lumen could be that person, and heck, at times he's even found (temporary) comfort in his relationships with some of the Big Bads he's gone on to kill.

With Deb deciding that she doesn’t want anything to do with Dexter’s real identity and simultaneously suffocating him and giving him the cold shoulder, he probably feels particularly stymied and frustrated.