She would have had to have spoken out first from her cross, meaning that she was still in good enough condition to talk, to tell the guard that her leg was cramping.
I would really love to see the whole big picture of this shot. She seems to be wearing a loincloth on what is visible of her lower half. I hope she is naked in her top half, bare-breasted. By the looks of her blood-trickled thigh and lower leg, she appears to be a somewhat muscular girl. Possibly a warrior-woman. The trickles of blood indicates that she is nailed.
The fact that the guard is concerning himself with a female (crucifixion) victims cramping leg, which presumably she brought to his attention verbally indicates that it is one of those crucifixions where the crucified and the guards "cooperate" to achieve the same end result. The guards allow some give-and-take not for mercy sake, but to prolong the victim, basically allowing the victims to get a few things go their way. As compared to the opposite type of crucifixion where there is intense brutal extreme treatment where no care or interest is given to the victims suffering, but inevitably the victims don't last long.