I think pregnancy track will lead back to Anjali MMS track.
Cause though Kahu will blame Pallavi not knowing it's Amrutha that's pregnant, once Kahu knows the truth, she will force RR to marry Amrutha. I think that's why the scene of Amrutha coming intoxicated to RR's house was included. So Kahu can cook up a story that RR took advantage of Amrutha when she was intoxicated.
That's why even Anjali MMS drama was done. So RR's Amma can pressure him to marry Amrutha, after that incident, she won't beleive RR. She will probably say if you want to ever see my face, marry this girl and take responsibility for her and the baby.
And finally, Pallavi will save RR from badnami and the marriage. That's when I feel RR will believe that Pallavi didn't leak the MMS of him and will look into the issue. And it will come full circle.
bang on ...hope that happens