My Prediction..

Dev discloses his relation with Sona to mom...She neither approves or disapproves..But says some mean things to Sona (which Dev happens to overhear)...Dev doesn't wish to reopen the topic and Sona quits her job and moves on to another job..telling Dev that she isnt gonna call him.

I feel this break up wil be like some small fights now n then then patchups sona leaving the job etc...it won't be like they won't call or meet each... If these 2 don't c how wil the show move with other characters...that wil b boring ...they might not talk for an episode or so not more I guess...

I feel dev will notice his maa's changes from the photoshoot and halwa wali scene and more drama to take place there after so he can't see sona to be insulted anymore in his house,then he will decide to separate which he can't

Its driving all of us crazy ..bcos we know there is some displeasure created by Ishwari..which is visible..

I think Ishwari is smart enough to ensure Dev doesnt hear when she says derogatory remarks to Sona. For Dev aka tubelight, to realise anything Sona wud hav to go thru hell.

Sona quits job is not possible today..

She won't quit now..only after the Halwa drama.

If you see the olvs . Dev literally puts words in mouth saying you think sonakshi like ur daughter and younlike her right etc. sh just says "meri jhushi tere khushi se alag nahi hai dev".
So yes she will reluctantly give her nod. Our gkb will not keep quiet and will keep on pressing wrong buttons for ishwari.. Then episode after episode dev and sonakshi both will sense ishwari is not happy (they dont know the reason). There will be some incident and after which sona will say she will no longer work there and join hospital(not sure howcvswill show this). It can be shown either way- sona being around is causing ishwari more sick and deprrssed so she will move out herself or the reports come back fineand ishwari doesnt need sona anymore or some high voltage drama that will make sona sad and leave.

In second promo dev did say "tumne tho kaha tha ki kabhi call nahi karoge" . So sona told him that she doesnt wabt to talk to him. But she still keeps in touch with maa as her nutritionist...

I feel once Dev realises tat his mom is nt in favour of Sona ..he l let go of her ..to himself in a safe zone wer Ishwari will be happy to get back his son ..on d contrary he will start missing Sona miserably n will find opportunities to meet her up ..he won't be successful in letting her go completely..her thoughts will occupy his mind ..at d end he might end up taking a drastic step of marrying Sona ..may be neels come bac n jealousy factor may help Dev to take this decision , together Dev n Sona might make Ishwari realise tat Sona n mom r two sides of the same coin in Dev s life n u cannot seperate both ..dono ke Bina Dev ki zindagi adhuri hai ..

Just my thought:) all 's well that ends well !!