I watched that whole episode and don't know if you noticed but even though Namie and Boa talked to each other (while others were talking), neither of them talked to Ayumi (and Ayumi was sitting next to Boa). While I don't think there are hard feelings amongst them, Ayumi seems more standoffish. Like, she won't talk to them unless someone initiates it (Tamori, etc). In the clip of Ayumi and Koda Kumi at the Mr. & Mrs. Smith premiere, Koda seemed like she wanted to say something to Ayumi and kept looking over at her but Ayumi didn't reciprocate.