Do you capitalize the sentence after an internal dialogue (a.k.a. thought bubble) that uses a prefix tag? That is, in an example like:
Will thought, My father must not like me.
Or do you do:
Will thought, my father must not like me.
I'm leaning toward capitalizing, because if you wrote this out with quotation marks then you would obviously capitalize.
Will said, "My father must not like me."
But when using internal dialogue and italics, the capitalization leads to a strange effect because you would not normally capitalize after a comma.
(For the purpose of this question, please assume I'm editing a book where I would prefer not to modify the sentence structure unless I absolutely have to. If it were my own writing, I would not use a prefix tag with internal dialogue.)