ClintACK, I came to the same conclusions after rereading Even Hand.
I was wondering whether Justine was the one to send Shagnasty after Thomas. I'm starting to suspect that her brains were never cured. While she still loved him at the time, Nemesis did the thinking. Making her believe that it was for Thomas' own good if he returned to his Vampire ways.
Do you suspect that Besides wanted to cast doubts on Justine's every action since White Night at least by lying about the time of the infection?
I dunno, it makes a lot of sense to me that it was telling the truth. Harry was not supposed to survive at that point. Of course, Besides could have done it anyway, just to torment Harry or in case Harry escaped. He is a Starborn after all...
The implications are severe if Besides was telling the truth: It would mean that True Love and Nemesis can coexist (at least for a while), Nemesis might even be able to abuse it (that's what I think happened with Justine), Thomas will have to come to terms with it that the healthy and seemingly sane Justine he loved was a puppet the whole time ... it's very hard to swallow but is it really impossible?
I don’t know. It is even possible that she was infected earlier but the possession came later. If it is just an infection the infected can behave mostly normal and is only influenced in specific situations. That could be compatible with true love.