Eddis, Attolia, Sounis

I'm rereading QofA for the millionth time, and stumbled on a question (as I usually do--it's why these books are so rich and lovely--they never stop giving, no matter how many times you read them).

You know that iconic scene from chapter 9, where Eddis arranges for a picnic on the mountain with Eugenedes and the Magus? It's an opportunity to send multiple messages to Sounis and Attolia (1. It was the Eddisians who stole the Magus and 2. To suggest something amorous between Eddis and Eugenedes).

For the entire picnic, Eugenedes is in a sour mood. On my previous reads, I didn't think much of it  because he was so often moody (and understandably so, considering all the trauma and ptsd and general mass of emotions). But Eddis seems to emphasize that she "knew the Magus wondered at [Gen's] bad temper." And, then, in the very next line, she explains: "We are sending a message to the QUeen of Attolia [about a supposed love affair between them]."

Is Eugenedes in a bad mood because he loves Attolia and doesn't want to send that message?

I'm asking because all the other reasons  (like being considered useless etc, and having to live with the reputation that he creates for himself) are discussed much earlier in the passage and therefore not seemingly relevant....