I find people here are generally helpful, but you have to “advertise” your problem. That includes the thread title (yours is pretty good, but you see a lot that just say “Help” or “Please look at my model!”) but also includes informative images in the first post.
I know you tried, but you image is, first, cluttered up with the manipulator widgit and the grid. You could have turned those off and gotten a clearer screenshot. Second, there isn’t any mesh information. You mentioned matress, pillow case, pillow and sheet in the text, but showing the meshes in wire frame view might have suggested some fixes to people who looked at it. There is a real possibility that a simple change in topology of one of those elements might have solved your problem the way you intended it to work.
Anyway, don’t give up.