Is it possible to have Chrom marry Olivia and have Henry marry Sumia in the same playthrough? I'm asking because I read somewhere that all Chrom's potential female partners must be married off before Chapter 11, or else the game will prioritize one of them.
"The fans booed Santa...in 1962. He got over it, so should you."
I think you're confused about that statement. Chrom must be married off. If he doesn't marry Sumia (who most people pair him with) she can marry whenever she gets an S support with somebody, or if for some odd reason you don't want anybody to marry her, you don't have to. For Olivia, you have to pair her and Chrom up in the chapter you get her, i believe. And i also heard the only way to see their S support is after you unlock the convos after the game, I THINK. i could be wrong on this.