It was a surprise to say the least.  It is true that Infinite is close, but some members are closer than others. So when Sung Jong chose to confide to Dong Woo, it was surprising, but not unwelcomed.

It's hard enough to live up to one's own expectations, but then I have to due with all of your expectations as well. I chose this career, so I can't complain. But maybe, just maybe, sometimes it gets too much.