I'm a 37 y/o male and the legal guardian of my 16 y/o sister. I would like her to say yes sir/ no sir. Is that too far?

My parents passed 12 years ago and I became her legal guardian. The most important thing to me is that she grows up with manners. I think of it as a form of respect. I used to call my parents that. My parents were young to have me and old to have her. She's she's 21 years younger than me and my parents were... show more My parents passed 12 years ago and I became her legal guardian. The most important thing to me is that she grows up with manners. I think of it as a form of respect. I used to call my parents that. My parents were young to have me and old to have her. She's she's 21 years younger than me and my parents were like 21 when they had me. So I could basically be her father and I think it would be respectful. But is it weird ?
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