Mrs. Geraldine Teo has made local history by successfully invoicing her husband’s mistress for five years of backdated administrative labour.

The savvy housewife argued that while her husband provides the "hardware," she is the sole provider of the "software" that keeps him functional enough to commit adultery.

The invoice includes a 20% "Surcharge for Emotional Labour" and a standard "Laundry and Maintenance Fee" for every shirt her husband wore during his illicit trysts.

“Aiyah, you think he come out from the womb looking so handsome and well-fed meh?” Mrs. Teo said while filing a claim with the Small Claims Tribunal.

“I groom him until so tok kong, then she just come and take for free? No such thing as free lunch in Singapore, sister.”

Mrs. Teo has also implemented a "Prostitute ERP" where her husband must pay a $50 gantry fee every time he enters a KTV lounge or a Geylang alleyway.

“Last time I cry, now I just calculate the ROI,” she explained while checking her husband's credit card statements for potential air miles.

“If he want to satisfy his bird, he better make sure my bank account also fly high, if not I cut his bird off and sell as dried meat.”

Neighbors have hailed the scheme as a triumph of Singaporean pragmatism over traditional marital fidelity.