A teenage couple were jailed for two years and eight months yesterday for peddling psychotropic drugs in Tin Shui Wai by a judge who said a deterrent sentence was needed despite their youth and the fact that they were first offenders. Their teenage flatmate, who had just started using drugs, was sent to a rehabilitation centre for possession of a dangerous drug. Tang Pui-yi, 17, admitted two counts of trafficking and her live-in boyfriend, Pang Ho-yin, who turned 19 this month, pleaded guilty to one. Wong Pui-ki, 16, who also lived at Tang's flat in Tsz Yan House, Tin Tsz Estate, admitted one count of possession. The drugs involved were ketamine and Ecstasy. Deputy District Court Judge David Dufton rejected their lawyer's plea for leniency, saying that while all three were young and first-time offenders, the pair who sold drugs were motivated by greed. Lawyer Eric Lo Wai-keung, for the three, asked the judge to put Wong on probation, but Deputy Judge Dufton said that was not the best option given her weak self-control and lax parental guidance. 'Clearly, her parental control has been loose,' he said. 'At the age of 15 she was allowed to leave home while her brother was already in a drug addiction treatment centre.' Wong's probation report showed she started taking drugs in June out of curiosity but was not yet an addict. Tang's mother, who did not want to be named, said outside court that her daughter was a bad girl who had only herself to blame. The court heard that during a police operation in Yuen Long and Tin Shui Wai in July, an undercover agent contacted Tang, who offered to sell him 'candy' tablets for HK$55 each. The officer met Tang at Tin Sze Estate and paid for two tablets of Ecstasy, after which Tang was arrested. She later went home and surrendered a box containing 3.65g of ketamine and 73 tablets of Ecstasy which she and Pang admitted were for sale. Wong, who lived with the couple, surrendered 1.79g of ketamine and 21 tablets of Ecstasy, which she said were for her own use.