Hey there, such a brilliant series KS is i thought nothing could replace AStitva when it ended but i was wrong. The episode of J & B consummating their marriage was excellant and I don't think Jai regrets any of it or has feelings for Pia again (sucha horse face).
They both wanted it to happen and please please do not split them up they deserve to be together, he will get emotional after he hears of Bani in a fire and I reckon she will get pregnant.