If you haven't completed the dark brotherhood questline this has spoilers!

So, I'm at the part right after escaping the emperor's assassination, and I'm back at the dark brotherhood base by falkreath. I go in, kill some guys, meet up with nazir and the Night mother says to embrace her. So I go to her coffin, it closes, everything explodes, and she says "sleep". The screen goes black and it crashes. I just hear sounds of fire and/or dripping but, the game doesn't do anything. I pressed the xbox guide button to see if anything happens, it makes the guide sound but the guide screen doesn't load or show. I've done this 4 times and it always crashes after the night mother says "sleep". Anything I can do/try?

Try waiting for 24 hours.