When your best friend died, Shinobu found it odd that nothing had changed about you at all but you cried on her when you heard the news so she wondered what changed

The only idea of why you weren't showing any grieving is that you were hiding it. The two of you were getting ready for bed and Shinobu thought that maybe the two of you should talk about it

"Dear, is it alright if we speak with each other before we go to bed? Just a small conversation."