I love the story of this but every time I reread it the "love letter" chapter always gets me. What does she mean? That the happiness we saw is going to end because they'll break up and she'll go to way of getting married and having children? it feels bittersweet and turns the rest of the story over.
Tsumugi said what makes her happy is different from what makes Ryouko happy, so I don't think she wants a baby per se, just that she wants to find her own happiness like Ryouko what has found. I also think Megu was more referring to the romance of love letters dying not the romance between her and Tsumugi.
