Pretty sure as I missed a day twice on my new town and the day after she went back to saying, '.......' Though when I did unlock it I thought I'd missed a day not long before, but I think it's more likely I just forgot. (was TTing alot then)
Also I didn't talk to her the day the QR machine appeared in my alt town and then had a week where I could see it, but she wouldn't let me use it. <_<;