To Treat or not to treat

Shanti Patel, is a qulaified dental therapist/dental hygenist. She attained her degree from Auckland University of Technology. Shanti is the sole breadwinner of her house. She lives with her husband, Mr Patel (who got laid off from work 8 months ago and still cannot find a job), her 2 children and her mother and father in law. Shanti's husband has bad felicity smell coming from his mouth. He shows it to Shanti one afternoon and they discover that Mr Patel has 2 big large cavities (holes) on the right and left side of the mouth both on the 2nd Molars. Mr Patel prosposes that Shanti should just do the restorative treatment on his teeth in Shanti's dental clinic after 3 pm when her dental assistant goes home. As it is , they are financially very constrained and there is no way Mr Patel is going to a dentist and spend around $500 for his treatment. He says no one can find out. Shanti knows how to restore these 2 teeth very well. She has done these restorations on the same teeth like a 100 times on her adolscent patients who are less than 18 years of age. Shanti's scope of practice only allows her to practice these restorations on childen 18 years or younger. Should Shanti listen to her husband and do what he says like what Indian wives do and carry out the procedure in her dental clinic coz its also going to save them money or should she just tell him that she can't?