Who is my mums favuret?

hey, and im userly the good one in my house but i dont think im my mums favuret ( sorry about spelling :P ) i dont think this becouse i just got grounded and im not alloud to do any thing, the clostist thing to entertainment is utube and even that gets boring. but my 15Year old bro allways get grounded but gets let off easy. so i tryed this and acted my useuel self 4, 2 days and notheing. so i started arguing with my mum, and she was asking for a World Of Warcraft FREE trail, but i said no becouse i dont think that i should be giveing them away when she ent even nice to me, and my bro just gets let of the hock all the time. so i said to her you allways let my bro off the hock and why not me and then she said becaouse i all treat you differnetly. so i said why is my bro who is called Jacob you favuret and offcorse she denide. so how do i actully know who my mums favuret is??