First, she needs to go to Medical Commission and:
1. Get filled application form typist (QR 5)
2. Register for medical test (QR 100)
3. Do her blood and X-ray tests
After (typically 3 days) you get a results, just take them to immigration department along with her passport and your passport copy and inshaAllah they will extend her visit visa (you have to pay QR200 for every month of extension).
No need for your labor card.