My experience with Xoti was quite something. I consistently encouraged her to pursue Maia, told Maia to go for Xoti, and then near the end of the game Xoti decided it was the time to talk about her feelings... for Eder. When I said that she might be a bit too young for him she suddenly got all flirty and asked who wasn't she too young for (hinting at me, from my impression), at which point I had options to tell her to bugger off, to remind her about Maia or to kiss her. All of that while I was already in a relationship with another character.
So my guess is that it's almost impossible to botch her romance. You can throw her at Eder, you can trow her at Maia (and Maia might even catch her), but she will still remain available to you.
Yes she flirted, I turned her down, we did her quests and had several conversations on the boat. I just never brought her along in party other then her quest.
I should have been more specific, sorry. What I meant was did Maia have any conversation available after you lock yourself in on the huana route? Because I read that she will only have a "Maia is angry and wouldn't talk to you" line over her head after that.