So she'd forge an alliance with an atheist fighting against a tyrannical government, and then assuming they both survived, tell them "Thanks. Now, get the hell out, we don't want you here."?
Already answered this but you don't seem to get it. If she's really into freedom, she'd likely work with the person as far as he/she believed in furthering the cause. But if he/she turned out to be a Tom Paine and his/her beliefs were leading later toward despotism, she would be wise to say get the hell out.
Don't know the woman. Can't say for sure. But many christian believers would act according to the above scenario.