Should I buy god of war 3?

Im 15 I really love the series and I played all the other games and this is the game I wanted to get the most for 2010. I just wanted to know if it has like nudity or something and how gory is it. I can handle that but I don't want my sister or parents to see it and get freaked out. + my parents only bought me the other ones because they dont know what rated M is and I didnt tell them but I play on the Tv in my family room now so they're probably more likely to see it.+ the other two werent that gory and I looked up to see when the nudity are so I didnt have to play through those.