God doesn't normally use a man to disciple and/or counsel a woman unless he is a strong, wise and lives a life above reproach.
That this fellow desires to be used of God in bringing her to Christ and to wholeness is commendable, but wisdom says that a strong, godly woman, gifted in evangelizing and discipling needs to be included in the mix. The situations just related to us in his update tell us that.
Offering her the truth about Jesus Christ and hope for a healed and whole life is what he can offer her, and with prayer, the Lord Himself can extricate her without one getting into unwise compromising situations.
My pastors often say, "You can more easily drag someone down the stairs than you can hoist them up." Spiritually speaking, one can find themselves in compromise and fallen when we choose to go too far into people's lives.