Now Nick, first off, you're a wog in a wog family - therefore someone will always be better than you, depending on who tells the story - stop stressing about that, it doesn't matter.
And I've listened to some of your works, and they're good stuff.
But you do need to work on the titles of your pieces.
Seriously, using such titles as 'Fuck in F minor', 'Shit in D minor', 'Up Yours in D minor' is hardly going to endear you to the classical music world. (although spending a lot of time in minor's may endear you to the more paedophillic amongst them)
However, the advantage of having a cousin who does the singing and dancing, is that you can use the family connection to write material for her, and make a mint off the songs if she's successful, and once the hit tunes are written, you won't have to do jack shit, other than collect the cash - BINGO!
So start working on some hot pop stuff in your Cuzzin's style, dude! if you need lyrics, I'm happy to help!