still not married right?

Ok, I am certainly not up on my pop culture. But I was signing into my hotmail account and the news window always comes up first. There was something about Brad Pitt and Angelina. I believe she just had her twins right? So how many kids do they have now? I bring this up, or even choose to talk about it because I CANNOT BELIEVE THEY AREN'T MARRIED YET! What's the big deal? Why not bring kids into a real relationship of husband and wife instead of boyfriend and girlfriend. I don't get it. This world - I cannot believe what people can get away with, especially when it comes to children, family, and doing what is right.