我のdefinitely is a thing (ware no), especially if you're someone important like a daimyo. And と言いました is correct because you're quoting (or reporting) something another has said.

Right! It's like someone who knows what keigo is but otherwise has a very basic understanding of japanese grammar and compensated for that with google translate.

For the single と, I think they could've used a そして right?

I also tried to read that outloud and choked on the 我の. I first pronounced it like "wa no" then realized it was weird and went with "ware no" but something was still off. The weirdest part for me was that he literally quoted himself apologizing to the daimyo instead of using reported speech.

My japanese is still very basic, I had to use a dictionary for 浮気 and 公衆. I guessed what 明かす meant (idk of that's the right infinitive) based on the kanji, then confirmed.

Would edo period Japanese even have exclamation marks?

Thank you :)