Why was Booth admitted into the presidential box?

[Eva Elisabeth]

Thanks for all your comments! I, too, tend to believe she knew criminal things were going on or going to happen, and was struggling to justify her cooperation to herself, respectively to adjust her religious to her political or worldly desires (intentions) and beliefs. Thinking of JWB's "victimizing spell" Mr. Fazio mentioned I also wondered if these words perhaps indicate she sort of gambled and lost.
I admit I haven't yet considered the possibility of her intending to open a Chinese restaurant (perhaps indeed an endeavor that needs divine support), and Gene's suggestion made me aware of how much, even if strongly indicated, remains still speculation.