I'm wondering..

I'm wondering,is it possible that Humeira is Zoya's sister? In the earlier episodes, when Humeira did a fashion show, she was nervous and wearing a burkha, Zoya motivated her.. I'm speculating that maybe, Zoya's mum is Humeira's dad's first wife and Razia is Humeira's step-mum.. The way she behaved lately, spiking her own daughter's milk was fishy to me.

Plus tonight's statement from Razia triggered my thoughts 😕

Is my theory too far-fetched according to you? 😉