For years, the couple had allegedly been fighting over money.
Not just verbally, but also physically.
In one instance, it was so bad that he allegedly broke one of the woman's fingers. This was what her aunt, Ms Wong Siew Kuen, 50, told The New Paper on Monday.
On Sunday, it ended with the brutal death of a man, believed to be the wife's lover, at the family's home in Pahang, Malaysia.
Singaporean cabby Quah Tee Keon, in his 40s, allegedly slashed his wife's ex-colleague, Mr Ruan Chao Kiang, 33, at the former's house in Triang, Pahang.
Mr Ruan is a Chinese national who worked as a sales supervisor with a vegetarian food supplier.
Mr Quah had found the other man, who was in his underwear, with his wife, Ms Loong Mei Ling, in her 30s, in his double-storey house in Triang.
An argument ensued and he then allegedly slashed Mr Ruan, leaving him with multiple slash wounds.
He then turned to attack his wife, who managed to lock herself in a room and call her brother for help.
He then left the house.