As far as I have heard…the Halala like you said is the woman marry another person, have conjugal relations, Then IF she gets divorced, THEN she can re-marry her ex hubby. I think religously you can’t stage a halala that marry person X for 2 days then divorce and go back to the 1st husband. The lady has to get remarried and if my kismet gets divorced again THEN she can remarry hubby. I think it is such to punish the ex for giving divorce with harsh judgement or too quickly…otherwise why would he regret and want to go back?