A woman who enticed a 13-year-old boy into phone sex and tricked other teens into online relationships has finally admitted her offending.

Natalia Burgess, 29, was unmasked in early 2011 after scores of Christchurch boys admitted they had been drawn in by her posing as an attractive teenage girl on numerous fake Facebook profiles.

Parents spoke of the horrendous effects on sons who had been caught in her web, and one mother believed Burgess was at least partly responsible for her son's suicide in October 2010.

After a lengthy police investigation, Burgess was charged with two counts of obtaining by deception and one of interfering with a computer system.

Last week in Manukau District Court, after months of "tension" between lawyers, she pleaded guilty to the offending and the full details of her deception can now be revealed.

Between 2008 and 2011, Burgess created numerous fictitious personas by taking photos and details from girls' Facebook and Bebo accounts.

In February 2011, she approached a 13-year-old boy posing as a teenage girl. The names of the victims and her fake accounts have been permanently suppressed by the court. The summary of facts states she had phone sex with the boy "on a number of occasions".

"She stated she couldn't remember certain parts of her life due to her being a heavy drug user but made partial admissions to the facts outlined," police said.

Another charge stemmed from an incident in April 2008, when a relationship with a 16-year-old turned sour after the pair had grown close over several months.

Burgess even spoke to the boy's mother. After saying she was struggling to look after a non-existent daughter they gave her $379.

When the boy refused to give her his internet banking password she became angry and said she would not pay him back. The teen's mother told Fairfax her son attempted suicide twice over the next year.

Burgess also pleaded guilty to lying about a pregnancy in 2006 while living in Wellington. She went to The House of Grace - a home for pregnant teens that agreed to accommodate her as long as she paid living costs. After accumulating a $1400 debt, management approached Burgess and questioned whether she was pregnant.

She produced a letter purporting to be from a doctor but staff were suspicious about the poor spelling and grammar, called the doctor and discovered Burgess had lied and she was kicked out of the home.

Judge Gerard Winter was prepared to sentence Burgess last week but at the last minute, her father tendered his house as a possible home detention address.

She was remanded in custody until November for probation to check the suitability of the property but Judge Winter stressed that did not mean she would avoid jail.