I hate that my sister always asks for the world but I ask her to heat up 2 slices of pizza for me…

I hate that my sister always asks for the world but I ask her to heat up 2 slices of pizza for me because im on bed rest and on crutches so I cant do it myself and she just flat out says no but when ever she ask for something it better for damn sure be a yes because if not she is going to throw a fit... she is 16 and is just a total b***h..... ughhhhh