First of all, you have to boldly contact her and let her find out for herself that you are a reliable woman.
Being reliable does not mean that you blindly cater to your mother-in-law, but that you have your own principles of life, a so-called stance and persistence.
If your mother-in-law is a short-sighted and unreliable woman, and you two have very different understandings of things, you must also make her understand and reassure her?
Be brave enough to be yourself, make yourself better, and let your unique personal charm radiate from the inside out to conquer these men or women.
It doesn't matter whether you feel at ease or not.
Also, no matter how good you are, sometimes she will still worry, not because of any other reasons, but because of her mother's heart, whether she is a knowledgeable and reasonable avant-garde mother-in-law or an ignorant and ignorant mother-in-law.
Country women, before you love your man, love his mother.