My youngest sibling pisses me off a lot

She's only 12 but she says some really disrespectful things to me like telling me to kill myself I didn't tell her this but I want to punch her right in her face because she gets away with saying stuff like that all the time my parents don't care what she says they don't deal with her how she needs to be dealt with and I've told her to back off but she keeps doing it she thinks I'm playing when I talk to her seriously but she's gonna learn when I uppercut her right in the throat and Batista bomb her ass