Hello dear user,
Happy new year to you and family.
First of all don't take any stress for anything. Yes she comes under Obesity grade 3. She needs a proper Dietary guidance and a strict and customized diet plan with modified lifestyle.
Next Steps
I need a detail diet and health history of your wife to help you properly. You may consult me on practo on my slots timing 12pm to 4pm with your all details.
Health Tips
Eat healthy and balanced diet. Take small quantity and best quality and frequent meals rather than a larger meal a day.
thanks for asking.
wishing you a good health ahead.
Have a nice time.