There is no divorce that has happened. After C-night, Kunal had initiated a divorce, where both signed on the papers, but on the confession night they decided not to go ahead with it.
In the current track, Siddhi signed the papers (and that is what Kunal was referring to when he spoke to Seema) but Kunal tore the papers...
So, each once initiated the divorce but it never happened.
@Mages @Rani - you guys are right in thinking that Siddhi will think that Kunal signed on the papers..
Regarding the kids, i think this is what will transpire... Richa will be caught by Kunal while running away with the 1st child. Even though Richa has decided to get rid of that child, on seeing Kunal she will hand over the child to him... and gain some brownie points there...
Kunal will take the child and go away not knowing that there is another child. He had come to the prison to get the child and he has achieved that. While Siddhi will never come to know that Kunal came and she will continue with her MU that someone took away her first child... She will think Kunal never came
Later, i presume the kids will meet, and bring Sinal together!!!! Love Story Part - 2, i hope it is as gripping as first part...
I want to see Sinal getting married once more, this time with 100% consent from both of them