I don't use Twitter, so I am not familiar with how their software works.

I know for a fact she is not blocking me, because she follows me and I can direct message her in private.

If you haven't replied and just can't see other replies, perhaps she is "muting" some accounts.

Yea maybe she is muting people. I know she gets trolled and harassed on a regular basis.

If I had a Twitter account, I would "mute" some accounts to see what happens on my own threads there - and probably message someone to find out how it affects their view as well.

Maybe there is a better explanation of how the Twitter software features work somewhere but since I don't use it, I'm not inclined to go searching for it. Maybe someone who knows something will show up in this thread to enlighten us.