15 tiers of dating
So Jake wraps Finn in tin foil, and when he is finished, Finn and Flame Princess hug, and Jake smiles oddly.
They let go after a while, and then Finn and Jake walk away into the forest, saying goodbye to her.
After doing some tricks that Flame Princess and Jake think are funny, Jake pulls him back up on land.
Princess Bubblegum wakes Jake up, requesting he tell Finn why he cannot be with Flame Princess, but he was not listening to Princess Bubblegum and then thinks that she is really jealous of Finn and Flame Princess. Princess Bubblegum asks if Jake explained why he cannot see Flame Princess anymore.
Later, Finn returns from his date with Flame Princess, and walks up to Jake, who was playing video games. Finn gets a bit annoyed by her, and tell her he understands.
If Finn kisses her, Flame Princess will burn through the Earth's crust to the core and will be thrown around by gravity, destroying the planet from the inside.
Princess Bubblegum then says that's why she had the Flame King lock her up inside the lantern, to contain her.