The invitations came as a surprise.
She spent the train ride catching up with her friends, showing off her OWL scores with a smirk.
Theo had spent all summer securing his rights as Lord Nott. And his first order of buisness was to very publically apologize-
"My father denied me the right to court you, so I was forced to cease contact."
-with a lie that explained away all of fifth year.
It wouldn't fool everyone, she knew, but Theo had kept to himself enough that so few knew what had actually occured.
Hence the invitations.
"...who's Slughorn?"