Moloy was my favourite Basu from s1 but this one is a total letdown. I watched the particular clip shared on drive as RB was mentioned and felt that the slap was totally unnecessary and showed nothing but the inherent misogyny. One loud Shut up! would have done the deed. The slap looked more like an expression of his own frustration. Moreover, this slap will further antagonize her.
As pointed out, Mohini did hell a lot of bad deeds and went unpunished every damn time. So why did she receive the slap now? That too for expressing a valid suspicion (going by how unreasonable this show is).
The timeline may prove that RB didn't father the child. But, timelines do not matter in this show that's totally devoid of logic. Had the actual timeline been followed, the child would have been born, isn't it? 🤔
So in a way Mohini's suspicions hold water. She didn't know Prerna was pregnant before her wedding with Mr Bajaj and is unaware of the fact that the two didn't even share a bed.