"I'm incredibly old, Rory," the Doctor said. Once the words were out they registered in the time lords head. "But I suppose you can understand that, can't you Centurion?"
Rory sat down next to the Doctor. "You could say that," was Rory's reply. After a beat he added: "I'm older than you, you know?"
"Oh, I know," the Doctor replied. "I'd give anything for it not to be so, but I suppose you would refuse if I could-"
"Doctor," Rory interrupted the Time Lord. "There's nothing we can do about it now, no use in dwelling on might have beens and could bes. What matters is what we have," the Centurion placed his hand on the Doctor's shoulder. " And we have it pretty good if you ask me."
Right then, River and Amy joined the two impossibly old men at the door to the TARDIS. "Are we ready for an adventure then?" Amy asked. Before either could answer she grabbed the two men's shoulders and said; "Of course you are! I've got ma boys, ma daughter and were hurtling through space and time in a little blue box that's bigger on the inside, what more could I need?"