@huhYeahGoodPoint I think it's a really bad idea to rush the Ami meeting with a 2-3 sentence plan for it. We need something much, much better and more detailed if we're to get anything useful out of her.
I think you're absolutely correct that Keiko will be unhappy about Hazou having met Ami without informing her. I do think your analogies aren't very well chosen here, though.
You describe their relationship as "estranged" and Hazou as attempting to "meddle" in it, but that normally applies to situations where both sides are somehow aggrieved and can't seem to work through their problems. That is not the case here. The relationship doesn't really even exist, because Ami unilaterally ended it. They're not nursing grudges against one another, with Hazou trying to play peacemaker. Keiko would love to have Ami back, she just doesn't think it's possible. It's not meddling because there's little to meddle in at the moment. Things can only really improve as a result of Hazou's actions.
To put it differently, I'm confident that if Keiko thought Hazou had a realistic chance of getting Ami to "forgive" her, she'd absolutely agree. I'm actually somewhat in favor of asking her, but there are convincing arguments against that as well. For example, if you look at Ami's actions objectively, the hypothesis of "she's faking it to protect Keiko" actually seems very plausible. It would be very difficult to convince Keiko of this though, and arguably cruel, as it'd just dash her hopes again if we fail.
Ultimately, I think it's fine if we take the shot. If it works, we can tell Keiko, and ask forgiveness, and if it doesn't, we hope she doesn't find out.
Someone eminently more qualified and entitled has decided that Keiko shouldn't know that Ami is faking it. -because it would be very bad for her.
In a funny way, losing to Keiko might count in our favor in Ami's eyes. As in, the fact that Hazou loses to her in front of the world's elites - a major blow to a young man's pride in the best of circumstances - and still proceeds to try and help Keiko by reconciling her with Ami afterwards. then that should be more proof that he truly cares about her.
-and thus all the more reason why she would need to distance herself from and avoid associating with Hazou.