SH and JKS's friendship goes a long way that they are already like brother/sister. From several of their past interviews we can gather that they are always in contact with each other and I'm sure our girl gives him moral support like she does with all her friends. Why...lately there are a barrage of posts about her friendship with longtime friends who she supports even if she's bashed (like Seo Tai Ji's wife, Daya of A.Kor, Tablo and many more). she is risking the wrath of the haters of the mentioned friends because they came to her for support. This just goes to show that she is a great and loyal friend. For a long time, we didn't know that these people are her friends. There is such things as private conversation which we are not privy of. Maybe just that she has no oppurtunity (like a show or whatever) that she can be invited to. And JKS was rumored to have a chaebol CEO gf and maybe our angel is considerate not to make her jealous by randomly messaging stuff about JKS. So chinggu don't fret....we know our girl. Haters really just find any reason to hate and as she is getting more popular...she is also a magnet for those. We have to take the good with the bad.
edit: @Kate...chinggu did you perhaps misread @minshin90 post to LJS or just drawing a comparison between Keunsuk and Jongsuk? LOL I'm confused with your answer. If it is the former ...then...I've also been there done that...hehehe Although I agree with you Kate that she keeps a keeps a distance after the drama. It's her one way to cope in order to regain her own identity as PSH the person...not PSH the character. She did it after YAB, after all her drama ended actually. After that she is free to frienzone them to borrow your term hehehe. If it is more than that then after withrawing from her character, we can be sure she is fond of that person and not the character she acted with.