Ok, after reading so much assumptions and grievances, I've a wild guess.
So like people assumed before the child might have KuKu's. After reading through the LU threads of some previous episodes I don't think anything is adding up. All characters flip 180° in next episode. So what I've presumed is that after KuKu convince MishBir about the surrogacy part, when Kuhu go for procedure she might come to know about her own pregnancy (the weight gain episode) so, she made a call to Abir stating the same. Abir informs the same to Mishti. Together they come up with a plan. So when Abir said 'Mishti is pregnant' (It's only him who read the report, I'm assuming. I've not watched any episode so this might be wrong.) That reports were actually of Kuhu's pregnancy rather than surrogacy reports. But both MishBir and Kuhu worry about the child as Meenu was hell bent on asli waris obsession. Therefore, Meenu doesn't come up with another of her antics, MishBir cancelled their adoption through Kuhu for the time being and informed the family about the kuhu being surrogate. The whole drama that is going on now about kuhu going to hospital for abortion to kuhu bullying MishBir is to show Meenu that everything is going as per plan. Kunal is included afterwards in MishBirKu plan. Even in today's episode, Mishti might be crying because though kuhu said to be in part but Mishti felt bad. Abir might have busted the plan but stopped due to Mishti. No other family member is informed about it, be it Mahs or RJvs. They'll drag the crap till the last.
Everyone is behaving according to the way Meenu want them.
At the end, everyone might have a win-win situation. Meenu might have a change of heart. She will accept the adopted kid and Kunal as well. Kuhu will apologise to MishBir for all wrong she said and done. MishBir will be happy with their adopted kid. Mahs won't be tired by gloating about their daughters. A happy family picture in the last episode.
The End.
The outcomes of this are as follows-
1) Kuhu whitewashed with shine wala distemper paint.
2) MishBir at the end will resort to adoption only,
2.1) a good message
2.2) MishBir fans happy that they're not obliged to Kuhu anymore.
2.3)Abir's progressive dialogues won't go down the drain.
2.4) Happy Ending.
3) Meenu will become the Ma Abir wants her to be and we get a hum saath saath hai ending.
4) Till this drama episodes are happening, I'm sure fans might stop the trend after the horror they are getting on 9pm slot. So trends stopped.
5) No extension. Going by SP's history this point is moot.
6) By Happy Ending, MishBir fans happy. KuKu fans all good. SP happy. DKP happy. Though the sadness of not getting the deserved will linger but this seems like a good option.
Thank you for reading this.😆
Hayee dil lelo if only we can get something close to this.. 😆