. . . for saying she was single when the truth is she was already married and had four children.
When she applied for a passport she declared herself single because could not produce her marriage certificate. Since she wanted so much to come to Singapore, she took the path of least resistance and declared herself single. So in order to be consistent, she declared herself single when she filled in her application for a position in Singapore. It was easy. No one bothered to check, no one cared. A woman may not be able to produce her marital certificate for a variety of reasons:
So when Ma Lhudie came to work in Singapore, she had to be consistent and declare she was single in her application too.
Women who lie about their marital status can be found out in a variety of ways. Eg: