Female Older Nymph Wiggling Abdomen

[Psycada]

So I’ve had a female roach that’s nearly a year old, and recently she’s been on the wall of the tank, wiggling her abdomen around, and sitting in a sorta hunched pose.

Is there a meaning to this? A little bit of her carapace right above her head is a bit bent, is she about to molt?

I searched this behavior and found males do this to spread pheromones and establish dominance, but I’ve looked and am very sure she is female.