Sexing help.. A.Cacatuoides

[Prawncoktail]

So, i bought this 'Female' the other day, and in the shop the entirety of the body was a yellow tone, both pelvic fins, and the first two spines of the dorsal fin are black.. 'she' does spend a lot of time 'nesting' digging the sand, clearing out seed pods and alike, however.. the last day or so.. the male has started to chase her more so.. which i understand would be his reaction to a non ready female being in his territory, however, my question is, do i actually have a female, or is it a sleeper male? I'm somewhat new to Apisto's in general, so would appreciate the help.
Thanks

Male

Female?

Female?

 

[Drayden Farci]

Looks like an obvious female to me, especially if it was yellow in the store.