Will my car insurance go down?

Ok so I'm 21 year old guy and drive a 2014 Ford Focus. For the last year I've been paying about 230 a month in car insurance (perfect driving record by the way). I financed the car all on my own too. So my mom lost her car (bad storm damage totaling it) and needs to borrow mine which I don't mind since I live I her house. If I add her to my insurance as a driver do you think I will get a discount? She's almost 50 with a perfect record too.

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