Chapter 8. Cersei tries to get some sleep and posthumously bonds with her twin, Viserys meets his bride for the first time (and creeps on his sister), and we see what becomes of Aemon 7 years later, while seeing a bit of the Targaryen-Lannister wedding. From here on out our story will really start picking up!
Do keep in mind that these sequences are POV. So Aemon’s recollection of the Red Wedding is colored by his own feelings and emotions years after the fact.
And I threw this together real quick with some clipart:
Aemon Sand's sigil as the Lord of the Tower of Joy