A woman who caused hurt to her then husband and two others through her negligent driving was fined the maximum $2,500 Tuesday.

Property agent Xiao Shi Ying, 35, who had pleaded guilty in December, was driving along Clementi Road when she coincidentally saw her husband, property agent Wong Hsien Loong, 41, in a car together with a female passenger. She sounded her car horn at him but he ignored her and sped up.

When their cars stopped at a nearby traffic light junction, she alighted and walked over to her husband's car as she suspected him of having an affair. But the lights turned green and he drove off.

Xiao continued to follow him and at one stage, their cars brushed against each other and came to a stop shortly. She again came down and tapped on his window but he drove off. She continued tailing him till she reached the junction of Commonwealth Avenue West and Vista Exchange Green where she failed to properly control her car.

She had swerved right and hit the back of her husband's car. Her car then overturned on the adjoining lane after hitting project manager Chionh Chai Binn's car.

Mr Wong's car lurched forward and hit the back of cabby Goh Ghee Min's vehicle. Xiao then crawled out of her overturned vehicle. Mr Wong suffered a left finger bone fracture while the other men had muscle strain.

A mandatory treatment suitability report found that there was no causal link between her depression and the offence. Xiao and her husband have since divorced.