Will she get married to Raj instead?
Since the start of Lata's track, i have been hoping for Raj to marry Lata but when Dev entered, i though that since he was a good guy, he might marry her though i always doubted him and after its revealed that he was indeed bad, i'm really hoping Raj would marry her now since its his sister Koyal who did all this.
Will she not pay any heed to Abha, Karan, and Raj when they try to stop her marriage?
Basically, Lata may be against Abha and Karan as they try to advice her as she has been so much of problems and just when she think she found the right man, the truth might be hard for her to accept.
Why has her behavior and attitude change towards her life/Abha?
She has been hurt too much and perhaps, Dev is successful in brain washing Lata and making her believe that he is indeed good.
How will Lata react to Dev's (AK's) accusations?
She may not believe and find it hard to accept.
And any other discussion about her role in the show!
As my guess, Lata might end up with Raj and Lata might not accept Raj as she have actually started liking Dev and Raj will have to slowly make Lata change and accept him. My guess.