Thread, rise from your grave
Well, keep in mind that the show doesn't follow real-time. For all we know several months passed between FIAD and PAP. Also, I think that Danny felt that he "lost" Sha're long before she actually died. When she died it was sort of like a confimation. Sort of like when someone is MIA for 2 years and final word comes in that they are dead. Some of the grieving process is prolly already done.
Also, Danny resisted and all they did was kiss. He prolly felt guitly after as well.
Anyway, just watched this ep on DVD and I came on here to post the same thought of most of you: Kera will use here latent genius and eventually find out who she was. Now will she kill herself like she was ready to because of the guilt and fear, or will she take it out on the people because they hid it from her? Could go either way.
All in all, this is a very good episode concept. The resolution is rushed, but the ep is pretty good.