What should I do with my old nanny? Urgent!

I changed my nanny five times, which was miserable. Some became grandfathers after the probation period, and some didn't come back after shopping all morning. There are many ridiculous reasons. Some people ate a big roast chicken regardless of the employer's expression, and began to take things when they were greedy. Finally, when she got to the police, she lay on the ground and said that her heart was bad and she had to go out as soon as possible. This last one is more profound. I behaved very well when I came and gave her all the keys to my room, because I had a deep conversation a long time later. Later, my mother said that she was short of 200 yuan when she went to see a doctor, so I scolded her that she must have made a mistake, and then there were some inexpensive things at home that could not be bought in the market. A few days later, I felt that the nanny was going to resign, and then I lost a new 700 yuan bottoming shirt, which happened the afternoon before I paid her salary. That afternoon, she made an excuse for me to take the children out, probably mopping the floor, and enthusiastically let my mother rest and closed her door. Then I called the police, because of the lack of evidence, she was very capable on the spot. Of course, because there was no evidence, I didn't say it was her. I gave her enough face and deducted my salary one by one, making excuses to quit her. Then I found a lot of things missing from the kitchen, and I lost them all that afternoon. This nanny hurt me the most. I often weigh whether to be a good person or a bad person in the middle of the night, because being a bad person can cheat, which is easier than being a good person. Looking back on the little things she got along with me, some things she asked me in life were the foreshadowing of everything she did. To be clear, one of her sisters lives not far from us, and maybe I am still supporting my family through her handwriting (I never ask about the kitchen, she is a nanny who goes out). Actually, she knows that I'm not worried about money because I lost something. She treated my tolerance as silly, which seriously hurt my self-esteem. My family is twins. Now I take good care of my two children and my sick mother in my bad business, and I no longer want to find a nanny.