sgcdonmai said:
I don't think it implies anything of the sort. There's not even blushing going on, which you almost always would find in a situation like that. The focus on MEIKO's lips is probably just to play up the sexualized older-woman aspect to the audience.
I can certainly see how some people could interpret it as not-yuri, but if I was doing a search on the yuri tag, I think I'd generally prefer to have 'open-to-interpretation' images like that included rather than excluded.
My feeling is that when an image can be interpreted multiple ways, it's better to tag on all reasonable interpretations... sometimes some of the best images are 'subtle' like this, so they can be read multiple ways.