Wait I just glanced through the past novels and in book 19 he says his mother’s name is juli. Maybe it’s a fake name since she is so famous? Sarah smith sounds like a made up name, smith especially is used all the time as a fake name, and Sarah is a very popular female name.
（￣へ￣）
Hmmm... she is also wearing baggy clothes so you can’t compare body shapes. She also tends to hunch over. She is wearing glasses, maybe a wig and she drew freckles on her face. It looks like it could be a disguise. They never show her face in the manga, so it is difficult to compare. ╮(￣▽￣)╭
There is also the question of why she would be going to the amusement park with a director. It can’t be to meet kyoko, since they met accidentally.
Still think it’s staged. Also would explain why she knows Japanese . And I’m sure she heared from her husband about kyoko
So Sarah is kyoko’s future mother-in-law????
(๑•ㅂ•)و✧