The 53-year-old thanked his friend for her tolerance, and promised to take care of her daughter.
The judge also warned the teacher after finding she had used generative AI to cite non-existent cases.
Both parties agreed to dissolve the union, which was legally invalid from the start.
They are returning to their home country after about 10 years in Singapore.
"More should have been done at every stage," said Minister for Social and Family Development Masagos Zulkifli.
Netizens deemed the act "dangerous", but some felt it was a "core memory".
The 27-year-old died in the hospital about a week after the attack.
A similar incident in 2022 also caused confusion -- it turned out to be a fire drill.
The home later shared that the siblings are now attending school and surrounded by friends and support.
The explosion of the vape's battery caused severe damage to his lungs and heart.