It sounds like the plot of an O. Henry story, but my mother sacrificed her hair for me.
When I was a young teen, there was a product on the market called Sun In. It was basically lemon scented bleach.
In the ads, dowdy girls turned into sunkissed blondes just by spraying it on their hair.
I had boring reddish brown hair and desperately wanted to be one of those sunkissed blondes.
My Mom tried to explain how it would turn my perfectly fine reddish brown hair into frizzy orange straw. I believed the ads over her.
So, to save me from ruining my hair, my Mom used it on her perfectly good reddish brown hair. And of course, it turned into frizzy orange straw.
She wore a hat all summer, and I felt guilty about it even after her hair grew out.
Sorry/Thanks, Mom!