Why i don't see my @replies in Expand menu? Please Help


For example here is a person i’m following. This person is not following me. So i see his tweets in my timeline. When he tweets I’m replying to him using ‘@reply’.I can see my reply tweet but when I look general timeline and press button expand menu i can’t see my tweet.So my reply i can see and tweet’s userthat I answered can see.Other users can not see.Why just I have this problem?