I disagree, 80 year experience as a vampire should be enough to be alarmed for potential hunters, even if you ignore the whole vampire community and infrastructure. Everyone can make mistakes but I didn't think her character would do a basic one like this. She is very level headed and we see her planning ahead for the worst multiple times. She is smarter than the average. I know why the developer did it anyway though, he wanted a dramatical scene where Sharon would feel guilty and a touching sequence with MC would play out as it did. It was very touching but still, I didn't like the chain of events that lead to that situation. Could've been better.
I don't think you can just dismiss as she must have seen it. From a point of view of how the facts were presented, I think it is possible to fall for such a trap.
Carmen did not appear out of the blue just to seduce MC to bait him. The couple (MC and Sharon) went to that bar on their own, somehow manage to see her and left. Later they decided to return to the bar and it was them that decided to pursue her as target. So while the way the reader felt about her was kind of obvious, as we are actively waiting for things to happen, it is not true for the characters. In fact, as soon as she was introduced we all knew that she was going to be important just because she was too hot as a model to use for a minor character. As simple as that.
In other words, as the scene was being shown, we assume it is important and the character matters. Otherwise, it is not being shown, then we automatically assume that something will happen. But for MC and Sharon, that is not true. They were just going back to pick a random target they selected.
Again, I am not saying she did not screw up and she should have realized. I am saying that screwing up is not bad plot. Making mistakes is normal and this was not such a big mistake in my opinion.
