Pallavi is the doctor who did Kunj's plastic surgery after his accident and gave him her husband Revant's face. She is obsessed with Kunj now, as is Yuvi with Twinkle (he's back to his nose-swiping villain mode). Pallavi and Yuvi have joined hands to separate Twinj, but Twinj are the end game and going strong.
As for Twinj's reconciliation, Kunj tried to get Twinkle back through honesty without playing any cheap tricks and finally won her over (during and after the college phase). Twinkle realized that she still loves Kunj and can't live without him. Usha wanted to get Kunj forcefully married to Pallavi but he convinced her to let him remarry Twinkle (with a lot of suicide drama).
Current situation: a few Twinj romantic moments and Yuvi-Pallavi conspiring against Twinj. The latest conspiracy is an MMS where Pallavi drugged Kunj and got intimate with him, and released it to the media. She also accused Kunj of being her husband Revant and committing bigamy by marrying Twinkle.
That's all dear. The show is ending on 16th Sept, so I'm watching it regularly these days.