She 'confessed to' a love of trashy romance novels. [=she admitted that she loves trashy romance novels]
I must 'confess' [=I am a little embarrassed to say] that I know nothing about computers.
She 'confessed to' having lied to me in the past. [=she told me that she lied to me]
(..) Baelor! Traitor! Traitor! I am Eddard Stark... Lord of Winterfell... and Hand of the King. I come before you to confess my treason... in the sight of gods and men. I betrayed the faith of my king... and the trust of my friend Robert. I swore to protect and defend his children. (..)2011 TvShow: Game of Thrones Title: Baelor Season: 1 Episode 9
(..) You want me to serve the woman who murdered my king, who butchered my men, who crippled my son? I want you to serve the realm! Tell the queen you will confess your vile treason, tell your son to lay down his sword and proclaim Joffrey as the true heir. Cersei knows you as a man of honor. (..)2011 TvShow: Game of Thrones Title: Baelor Season: 1 Episode 9