How can I make my aunt buy me a car?

sooo...im a really good girl...like literally I told my dad if I can skip cl...i telll my dad everywhere I go...everybody in my familty tell me they wish they had me for a daughter..lol..i even get good grades and I have a job..i can't but I car because I have no income..im 18 bd I just start working.. How can I ask her for a ford focus I really want? I don't want to say p" can I please have the car..i want to ssy something that will get her to thinking...