She had sold the videos on Sammyboy, an online forum in which users can upload and exchange explicit material, Channel NewsAsia reported.

Marketing executive Heng Li Ying offered to sell the videos for 10 or 20 cents per second of footage, sweetening the offer by throwing in “free obscene videos” with each purchase, deputy public prosecutor Winston Man said.

Heng made S$1,540 (RM4,780) in about five months by selling the videos to at least 22 people.

She pleaded guilty today to three counts of insulting the modesty of three women by filming them in the nude or in lingerie and with another three taken into consideration during sentencing, the news portal said.

Man said it was unclear where Heng got most of the explicit videos from but she had taken at least three herself.

Heng, a member of a well-known gym, had filmed three victims in the changing room at the chain’s Suntec City outlet in April 2014.

Heng’s offences came to light when the management of the gym found out that compromising videos of members in changing rooms had been advertised for sale online.

Following a police report, Heng was exposed.

Heng’s lawyer Rajan Supramaniam said his client had been unable to secure a permanent job for seven years and had shown genuine remorse.

For insulting the modesty of a woman, Heng could have been jailed up to one year per charge and fined.