So as to the first bit about Charming and Rumple….this is my thought. Charming’s character has always been “white knight” even against those he may not *like.* So I think the favor is going to go like this:
*Rumple saves Charming*
Charming: “I owe you!”
Rumple: “Free of charge. My son asked it of me.”
Charming: “No. No, I owe you. For this and many other things.”
And Rumple, being Rumple, take him up on his offer.
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"He was a lot of things to me" "The only conclusion was love"