This is great
Though I wouldn't go so far as to say that people on this site suck their fathers' genitals. You only look like an idiot insulting the general populous (as far as your audience is concerned) with such hideous grammar as to use "there" as opposed to "their."
That said, I think in the beginning, you could have had your cousin do one more take. The emotion and voice is spot on, and she has a dazzlingly beautiful voice, but it seems as if she hesitated on the beat just a few times and it gives the part a bit of an awkward feeling.
Your mixing and effect usage was spotless, and creates a real wall of sound that I've taken pleasure in listening to. I only wish it had been longer. This song is great. 9/10, 5/5
Good job, and Merry Christmas.
~Wes