WIBTA if I (M22) show up unannounced in the country of the girl I want to marry (F16) with my dad’s boyfriend (M30) and a small retinue?

Long story short, serious negotiations have been going on for me to marry this girl for YEARS and it seems like they’re going nowhere. She’s also Catholic, which is a big deal, and there are A LOT of people who don’t want me to marry her (not that it matters what they think).

But it would be really great if the marriage goes through, since her brother Philip is at war with my sister and brother-in-law, so if we get married it might bring peace and help them get their territory back. Plus it would be a great dynastic alliance! Mostly, though, I’m tired of all the will-we-won't-we drama, and I just want to get married already.

So here’s my plan:

I’ll travel to Madrid with my dad’s favorite courtier B in a fake beard and go by “Tom Smith” so nobody suspect a thing until I get there. Then… Surprise! We'll meet, she’ll be smitten, and her family will be charmed. In short, I'll have solved diplomacy with the power of true love.

Frankly, I can’t see any flaws with this plan except that it maybe might cause an international incident. I think it would be pretty romantic, but I really want this girl to like me and I'm nervous about blindsiding her with this. So… WIBTA?