[Marc, thankfully, doesn't read the letter. She is a little surprised to see a letter from Chrom. He lives with her, after all. But... it must be something important. She opens the letter and reads the first.]

[...In short order, she is terribly red-faced.]

[Moreso after she reads the second letter. Her reply takes a bit; as long as it might take to make him nervous, though it's not her plan. She just needs to think -- to be sure she gets it right.]

Dearest Chrom,

I was pleased to receive your letter. I know that the events in the alternate future -- and other events, since then -- were trying for us. You are correct about my feelings and my fears about that. I know we have learned a great many things, in rather strange ways.

But...

I would be happy to go somewhere with you. Let us try it, and see what the future might hold for us together. We were always stronger together, weren't we? I would rather face the future at your side. I have seen one that I face alone.

Always yours,
Robin

P.S. In case it wasn't clear through my rambling: "Yes!"