I really like this you have an intresting take on the subject and the characters are so engaging and have a wonderfully funny way of interacting.
I rather liked you character dynamic too. Small Dom/big sub is definitely one of my favorite kinks. Especially if it's a big strong gentle hearted sub. Always fun.
I would like to mention that you should separate your dialogue in the standard writing fashion to spare your readers any confusion.
"Are you going to the park?" "Yes" is way too confusing especially if you have a lot of dialogue. There are other variables but generally, when two different people talk, each dialogue quotation has its own paragraph. Hope that helps.
It should look more like this:
"Are you going to the park?"
"Yes."
She can and should relentlessly needle him about cheating. Which he did in fact do. He broke the spirit of the agreement while following the letter of it. He conceded the moral high ground.
Are you sure he's a paladin? Lawful Good generally does its best to follow both the spirit and letter of deals and such. Its not a major sin by any means. I'd argue it's more of a lawful neutral action for sure. Since erika pulled something similar in the last deal but at the same time. He's still skirting the edges of a paladin's code.
He's definitely a smart lawful character that's for sure.
I have a little issue with this, namely the fact that if you are referring to a character as a she, I don't believe it should be in the male/male catagory even if the characters are both biologocally male, but that is just my opinion. I am personally not going to read this story as I would consider this a (trans)female/male relationship and I am not into female/male stories which is also why I felt I should mention my issue with its placement.