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]
(..) Yes, I have. And I have given him an angel to do his will. For surely there is no better soldier for God than my Silas. I firmly resolve, with the help of thy grace, to confess my sins... ...to do penance and to amend my life. Amen. I chastise my body. The Holy Grail. (..)2006 The Da Vinci Code