Two points about that intro question:
1) Miss Sunflower fully accepts that Matsuri loves her--not that she says she loves her, or she thinks she loves her, etc.
2) This is the bog-standard "early relationship" question--"What is it that you like about me?" It's a key to understanding the other person's feelings, and can be an ego-boost (you get to hear a list of your own admirable qualities) or a reality check (you find out whether that person's idea of you is grounded in a version of you that you even vaguely recognize).
Put another way, it's almost like a marriage-interview question. And at the end Miss Sunflower has no problem with Matsuri saying she loves her, just "not so loud."