Dedue supposes that he isn't surprised that Felix despises any kind of long, honest communication about his feelings, since he seems quite intent on insisting that he doesn't have any except anger and irritation. But it seems reasonable enough to manage the logistics of polyamory by maintaining good lines of communication between the relevant parties. Since that would involve himself and Dimitri at this juncture, informing him of any changes that might occur on the relationship front is doable. A definitive course of action. Dedue does prefer to have clear and actionable expectations. He knows what to do with those.

"Understood. Though even if I were to take another lover, I do not think that they would ever occupy the same place in my heart that you do."

Nor would he necessarily want them to. This does, though, also segue well into something else that he should bring up with Dimitri, about events that only just happened earlier this morning. It's barely sun-up and his day has been surprisingly busy.

"I suppose that this is as good of a time as any to tell you of the conversation that I had with Byleth earlier this morning. After delivering his birthday gifts for me, he expressed a desire to court me."

It's still a strange thought, for him to be courted. He is no dainty noblewoman who must, for propriety's sake, be plied with flowers and love-letters for a prerequisite period of time before being allowed to hold hands with her beau in the presence of a chaperone. The idea of Byleth going through any of those intricate steps for him might almost be laughable.