[@Revans Exile] Maybe I was mistaken, then. When I picked an ending, it was the one where Shepard sacrificed herself to momentarily control the Citadel and command the Reapers to leave. However, the way it was described made it sound as though the Reapers would eventually come back. I could have just misinterpreted it. 

If we're going to do the ending you chose, you'll have to walk me through it.