Yes, she does like to wrap things up. My theory is that she will introduce Coyote, maybe have him work with them against Maina a bit and then end AHnY on a "and now Steal Moon happens" note. Whether she chooses to continue the storyline after Steal Moon is less likely as she basically wrapped that one up pretty succinctly (Nozomi and Coyote go off happily ever after and all is well in the city of Akatsuki...). It's essentially how wrapped up Yellow was, even though there was plently open-ended that could have continued. Tateno hasn't written anything that long-running in BL before. She ran KIng of Cards for 9 volumes or something, but that was shojo. She hasn't broken the 4 volume mark with any BL yet and I am curious to see if she will someday (will Karen give her the green light to keep AHnY running past 3 volumes?).