He performed sex acts on his stepdaughter, telling her it was his way of showing love to her.
And if the young girl agreed to give him oral sex, he would buy her presents and give her extra pocket money.
If she refused, the man, who was working as an after-sales manager, would punish her by withholding her pocket money.
This went on for about a year before the girl told a classmate about her stepfather's sick acts and subsequently made a police report on Oct 3, 2013. He was arrested four hours later.
Yesterday, the man, 43, was sentenced to 17 years' jail and the maximum 24 strokes of the cane after pleading guilty to two counts of sexually penetrating a minor without her consent, two counts of attempted rape and one count of outrage of modesty.
Ten other charges for similar offences involving the girl were taken into consideration.
The man, who was not represented by a lawyer, cannot be named to protect the victim's identity.
The court heard that the accused had sexually assaulted his stepdaughter 15 times from late 2012, when she was just 12 years old, until his arrest.
He had become the stepfather of the girl and her younger brother after he married their mother in 2007.
The family lived in a flat in central Singapore and she called him Dad or Daddy.
Deputy Public Prosecutor (DPP) John Lu said that in the beginning, the girl did not take to her stepfather. But their relationship started to improve a few years later.
This was around the time of the offences as he started buying presents to reward the victim for participating in the lewd acts.
Said DPP Lu: "Every time the accused performed a sexual act on the victim, he would tell the victim that he was doing so to make her feel high and warm and also to show his love for her.
"He also told the victim to keep these sexual acts a secret and that she would get into trouble if she told anyone."
He started performing indecent acts on the girl before the release of her PSLE results in 2012, the court heard.
Later that year, she was in his working room in their flat at around 9pm when he slipped a hand into her shorts and sexually assaulted her.
On another occasion in the same room, he engaged in sexual acts with the girl.
He then put on a condom and tried to rape her but failed because he was unable to sustain an erection.
In August or September 2013, he was alone with his stepdaughter in the flat. He called her into the master bedroom, asked her to strip naked and made her watch pornography on his laptop.
He then put on a condom and tried to rape her again. She tried to pushed him away in vain. But he again failed to sustain an erection and abandoned the attempt.
Sometime that year, he took her to his office in Bukit Batok and forced her to perform oral sex on him.
On another occasion, he took the girl to another office near Jurong and molested her.
The offences came to light after the girl stole her classmate's wallet on Oct 2, 2013 and was caught. She later apologised to her classmate, who asked her why she had committed the theft.
The girl then revealed that her stepfather would ask her to do "dirty things" and if she did not finish doing them, he would not give her pocket money.
The classmate advised her to tell her mother which she did that night. As it was late, the mother said they would talk more the next day.
The following day, the classmate informed their form teacher. The school then contacted the victim's mother and Child Protection Services (CPS).
After she was referred to a CPS officer for a check-up, the girl made a police report at around 5.30pm that day.
Quoting a report by CPS senior consultant Parvathy Pathy, DPP Lu said the girl would sometimes feel angry about what had happened.
He added: "The victim felt guilty about disclosing the acts and felt bad that she had 'betrayed' her stepfather who had asked her to keep the acts a secret."
For each count of attempted rape, the man could have been jailed up to 20 years and fined or caned.