This plot point paves the way for a good deal of foreshadowing, and I thought that was fun. Harry is already the king of temper tantrums, and he's making a scene a privy council meetings, stepping on his father's toes, and basically acting like the self-righteous, self-centered, self-everything tyrant that he will ultimately become as king. Catherine, at the same time, is having dreams where her mother is warning her of the pain of betrayal that will come from Harry (and we all know what that will end up being). I like what the writers did here!
Of course, Margaret Beaufort has already planted a small seed of doubt in Harry's mind that Catherine is only after him out of her own ambition - not because she loves him at all. She tries to insist that Harry's infatuation for her is entirely lust, not love, and even sends prostitutes to his room so he can sow his wild oats and be done with the Catherine fantasy! Nice try, Grandma, but Harry will not be deterred (though he will sleep with the women you brought him).
I have to confess, I don't love these side story lines (considering Rosa and Lina are fictional, and just don't hold much intrigue for me)... but the real meat and potatoes of this episode's plot was a little lacking, so I understand the need to jump off into the sidelines for a little more drama.
Long story short, Catherine convinces Henry VII that it's a better idea for her to marry Harry - both for the succession and the England-Spain alliance. He eventually agrees, and the new betrothal arrangement is announced. YAY for Harry and Catherine! They're finally getting what they want.
We end the episode on a serious bummer of a note, when Maggie Pole's husband, Richard, is crushed by a wagon and dies. Poor Maggie is now banished from court, out of royal favor, and widowed with children. NOT a good time to be Maggie Pole.
Ultimately, I really liked this episode, and I particularly loved all of the foreshadowing. We're seeing glimpses of the Henry VIII we all know in the future, as well as the hints of heartbreak ahead for Catherine. Of course, we won't see those things play out in this series, but the Tudor enthusiasts out there know exactly what's coming. Another great episode all around!