Never lie about this

it's something so easy to be found out. Parents visa are mostly luck really. My parents got visa together, I am the only child, they are both retired. The people outside consulate said that they don't have much hope but they still did get visa. Plus unless your mom has talent in performing, she will probably look unnatural or nervous to lie to the face of VO. Not worth it. If the worsest thing happens, she can always try again. But if she is caught lying, she will never have another chance. Tell the truth and good luck.