Short answer: yes, a ton. Their blood relation is the bomb that blows up all their plans. Jon has a better claim to the Iron Throne than Daenerys does.
He is the male heir of Rhaegar, who was the firstborn son of the Mad King. Daenerys is the daughter of the Mad King, but in their world, men come first. Jon is the rightful king—and she doesn’t take that well.
This is why she eventually snaps. She offers him love, but he offers her a threat. Their family connection makes her feel betrayed, even though he never asked for the crown. It’s a tragedy written in dragon fire.
The Takeaway? It’s Bittersweet
So, are they related? Absolutely. Is it weird? Completely. Is it interesting? Incredibly. It’s the kind of secret that makes a good story into a legendary one.
Jon and Dany are a mirror. They both want to break the wheel, but they are the wheel. Their blood links them to the past, and that past is full of fire and betrayal.
Next time you rewatch their first meeting, pay close attention. They are drawn to each other like magnets. Now you know why: they are family, even if they don’t know it yet. And that’s the coolest, most messed up part of the whole saga.