Because of peer pressure, she was determined to shed her pregnancy pounds as quickly as she could.
The extra weight made her feel insecure, confesses the now slender mother of two.
Says Ms Catherine Chew, 32, a full-time housewife: "What if I look older than my husband or look fatter than him? I will mind it.
"He would say he doesn't mind but when we go out, I want to look compatible with him.
"What if people think he is my younger brother? He is thin and people usually think he is not married."
The trend of mothers being desperate to lose their pregnancy weight gain quickly has come under the spotlight in recent years.
Celebrity mums here already have a weight-loss regime in place even before they pop.
The Huffington Post UK reported in April this year that nearly eight in 10 mothers feel pressured to bounce back into shape after giving birth.
It quoted a survey by two websites that was conducted after Simon Cowell's partner Lauren Silverman was snapped by paparazzi with a slim figure, just two months after baby number two.
The pressure is on when images of slender new mothers circulate on social media.
Says Ms Chew: "When you see your friend having a good figure very soon after giving birth, chances are you'd also want to look like them."
Her friends' comments about her body shape also spurred her on.
She says: "My friend said that after giving birth, I looked 'very auntie'. You will make the extra effort to look better."