The entirety of the Reformed confessions are unequivocal in asserting that all believers are to unite themselves to true churches, despite the fact that the churches have many failings. They are also unequivocal in stating that all Christians still sin.

Of course, if this person were to join a confessional Reformed church, she would shortly come under discipline for her false doctrine, i.e., perfectionism. If sinless perfectionism is Reformed, then I'm a helicopter.

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Philip A - Member, High Desert United Reformed Church, Apple Valley, CA.

"Reason also is choice" - Milton, Paradise Lost
"And then shall every word also seem consistent to him, if he for his part diligently read the Scriptures in company with those who are presbyters in the Church, among whom is the apostolic doctrine, as I have pointed out." - Irenaeus, Against Heresies, IV:XXXII.
"where there is text, there is hope" - Richard A. Muller