@Sachasa, thank you for being here and wonderful post.
Yes, I think that was the first time JKS said that his mom likes/loves Shin Hye very much publicly.

And also yes Shin Hye called mama Jang eomonie in that video (first video). That was commercial gathering for Samsung, in which JKS is the model. (May be mama Jang asked JKS to bring along Shin Hye. That's why JKS keeps on looking at mama Jang direction & he seems so proud about it.)
@emerald kikyou, thank you for the video. Why Shin Hye should get mad wheb JKS picked KHN? I bet, she was surprised herself by her reaction.

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@Verba_, yes we know so many girls born in 1990, but please this is GeunShin thread.
@teacake27, thank you for the information.