They're the aunt-and-nephew lovers we were all rooting for – the King in the North and the Mother of Dragons. (aka The Mother Of All Incest Storylines.)
We've established beyond doubt now how the two are related, or at least we think we have, but what's next for the unwitting heir to the iron throne and the putative Queen of the Andals and the First Men?
Daenerys is pregnant? How come?
Daenerys has made it very clear that she believes she can't have children. The witch Mirri Maz Duur told her after the stillbirth of her child with Khal Drogo that she would bear a living child "When the sun rises in the west and sets in the east. When the seas go dry and mountains blow in the wind like leaves."
Jon cast some doubt over Mirri's trustworthiness in the final episode of Season 7, but Daenerys seemed pretty confident, so we can assume she either has a lot of faith in vengeful sorceresses' prophecies or she hasn't been having periods for a number of years.
(In the books, incidentally, she appears to suffer a miscarriage fleeing Meereen – after several months without a period – before she is captured by the Dothraki and taken to Vaes Dothrak.)
There are five (and a half) compelling reasons to believe Daenerys is now pregnant, following her bedroomy funtimes with Jon at the end of Season 7:
1. The prophecy
Has it actually come true? Consider "The sun rises in the west". Book fans are fond of claiming this refers to Quentyn Martell's journey from Dorne, in the west, to Meereen (the Martell sigil is a sun with a spear through it), where he dies ignominiously.
Well he's not in the show, so how do you explain that one?
One (slightly desperate) answer is that Mirri actually said "the son". Jon is the son of Rhaegar Targaryen, and very much on the rise in the West. His relationship with Dany might be called setting in the East. No? Anyone? Let's just go with it for the sake of argument.
How about the seas going dry? The Dothraki sea, the great grasslands, is pointedly drying up in the books (the show surpassed them around Season 5). So the sea's gone dry. QED.
The mountains blow in the wind like leaves? The wall came down, how about that? And Ser Gregor Clegane, The Mountain, is a shambling golem-like shadow of his former self. Yes, that'll do.
So the prophecy, if you squint and look at it from an angle, is fulfilled.
If you don't want to go along with that, let's just say Mirri Maz Duur was wrong. No reason to insist she was telling the truth, after all. She was angry and wanted to hurt Daenerys.
2. Tyrion's chat
Remember that weird argument Tyrion had with Daenerys about the line of succession in Episode 6? She got all upset about his insistence that she was too important to risk her own person on the battlefield before she'd settled the question of her heir.
That was a bit odd, wasn't it? A bit specific, you might say. Our point is: the show was introducing a storyline, planting an idea in our minds, and putting the opening gambit in Tyrion's mouth.
In the same episode, Ser Jorah insisted that Jon keep his ancestral sword Longclaw, even though it should properly be his, as Jeor Mormont's son. "I've forfeited the right to this sword," he said. "May it serve you well. And your children after you."
What's with the last line there? Again, a bit specific, wouldn't you say?
Spell it out, guys, why don't you?
4. The boat conversation
Daenerys told Jon on their journey back to Dragonstone, "The dragons are my children. They are the only children I will ever have. Do you understand?"
This is a blatant bit of ironic foreshadowing and should be translated as, "The dragons are my children. They are the only children I think I will ever have, but the fact that I've even been made to mention the subject so pointedly means that I will almost certainly be proved wrong. Do you understand?"
5. Cersei is pregnant
Ice and Fire. North and South. East and West. Bran is pushed from a window, Tommen jumps from a window. Catelyn's throat is cut, Walder Frey's throat is cut.
Our point is that Game of Thrones loves symmetry.
Wouldn't it be pleasing, story-wise, if Cersei is indeed pregnant, for Daenerys to be too? Not least because it upends that standard kings-fight-with-swords-for-the-throne model of fantasy fiction: two pregnant Queens as the last contenders for the kingdom would be a new and interesting direction for the genre.
5½: The iron-clad rule of TV pregnancy
Everyone always gets pregnant after one shag. That's just the rules.