Uh, Edward can think whatever he wants, but he ain't in Heaven to get word from God's mouth yet. Might soon be, if Marie de Guise gets a hold of him.
England's "Rough Wooing" was in full force at this time, England was already harassing the borders, seizing ships, etc. This would be one insult too many - to both Scotland and France (because the betrothal treaty was in force at the time) - it would be something completely different if Mary, QoS, had been just 'going to France' for a vacay or to see her mom's relatives, but she was going as part of a betrothal.....like the Treaty H8 proposed, the regent signed, but the Scottish parliament rejected (all in 1543). In the case of "going for a visit" - you can make an argument for detaining her for a while, but if Scotland wants her back, she's their Queen. It's not like the case of the older Mary, QoS, abdicated in favor of her son and goes into England voluntarily - this is a child, the monarch of Scotland. She's not old enough (and neither is Edward) to proclaim a mad passion and debauch her, in essence, forcing her to marry him. This scenario is England begging at least two nations to attack it in force, not the harassments of the 'Rough Wooing." This is one nation going "I've got your queen, I'm going to keep her and you just stuff it." Ain't gonna work.
You need a different POD.