Kendall Speculation

I'm not one to normally dig into things very much, but with Kendall releasing a song called "Shattered" and going on Instagram to talk about how personal the song is, it got me to thinking. I haven't seen him post anything about his wife or kid in quite some time and it looks like he scrubbed his wife off of his posts going back at least a couple years. She also doesn't have any recent pictures of him on her page. Did they split up? Was the kid not his?