Expected latency for "Did you sign in...."

Sadly, that won't work. She just doesn't have the tolerance to pursue this, so I'm not going to force the issue. To my knowledge, of the hundreds of these we've received over the years, most seem to come within minutes, but still...having one come a day later is an alarming sign that it might be someone else who caused it. But I'm not worried because her IP address in this case matches her iPhone, and she absolutely did use the Safari extension on her iPhone, which in itself, is rare. I know there's nothing bad going on.