Katies...I'd say a pant suit or something close to it. Plain or pinstripe dark pants, shirt/blouse/top with a collar, plain jewellery, natural makeup.
Aparet from teh fact that its a management position, Katies is relatively conservative so yeah, I'd go with that, presentation wise. You could probaby wear a long/three quarter sleved top too if you wore a jacket, even if you took the jacket off.
Makeup, def natural colours, or pinks even depending what suits your skin tone.

You dont want to lie or exaggerate unecesarily about anything else - you havent so far, and look where it has got you.

Good luck! Being a mum too, generally indicates you have good management skills! You generally need to!