Looks like Kon never let go of her obsession about being "normal".
She chose the wrong partner for that.
I agree. She is not asking that for AI's sake, but for her own insecurities, which is wrong. I wouldn't mind if she was asking that because she thought it would be better for AI's mental state, but that's not how I read the situation.
Ai is struggling, but she is really trying.
I don't think it's wrong pre se, it's a boundary for Kon that makes her uncomfortable and it's not a totally unreasonable thing to ask for.
What I would disagree with is the framing she uses for it, the "it's just normal, what you "ought" to do" part. That's just unhelpful.
I don't think it is unreasonable as well, but I don't like the fact that she hides her insecurities behind "normality ". I don't think she is aware of it, though. But I'm afraid her insecurities will push back Ai at a time when she needs the most support.
Even knowing she has a complex about being normal, I think this is less her hiding behind normality and more the fact that most people wouldn't have this much trouble deleting an ex's phone number especially if said ex had caused them as much grief as Kaede had. If someone would normally delete that ex's number, I think it's fair to wonder why they would deviate from that behavior.