My stepmother makes me fall in love with her naughty tongue

My dad has to go on a business trip for a week. It was always the case that my dad would go on business trips, but it was awkward to be alone with his new mother, Kanae, who had just remarried. And on the day I was helping out cooking, shaking away the awkwardness. As I was unfamiliar with it, I naturally cut my finger with a knife, and Kanae, worried, gently wrapped her fingers around her with her tongue... At that moment, an electric current flowed through my body. I was surrounded by mysterious pleasure...