Azi, while you might think taking your mother’s tichel is for her own good, take a few minutes of soul searching before you do. You say that you are very frum and even had a chavrusa bein hazmanim. Well, good for you, I respect that. But did you learn anything about respecting someone else’s property? Is takeing something and hiding it considered stealing? Did you learn anything about kibud am? Do you care ONLY about your mother’s olam haba or are you thinking about your shiduchim?
My oldest son is frumer than me. I eat chalav stam and he hasn’t sinse he was 13 (he in now married and in kollel). I told him at the time that I respected him for his decision but he better not try to change my house. Your wanting to change your mother because you are worried about what someone else will say doesn’t say much for you.
Perhaps you should want a shiduch who will look at you and see the mentch I hope you will be and not look at small avlahs on your mother.