Many would disagree, but I don't find veena asking pre to stop the wedding the right approach
It might be a clash of egos and self respect for her, but Sharma's have faced far far more humiliation than this. If we say veena reached a saturation with all this BS drama by mohini, and she doesn't want pre to go through that everyday, then it wouldn't take a second to break off the wedding but it would affect pre forever given that they are already married and this social marriage is just a show off to people who don't value them.
Instead, I would prefer veena asking Prerna to talk it out to Anurag and put things on hold, and make Mohini apologize in public or make a joint compromise.
Keeping aside the Komo track, Anurag has always stood up for Prerna, against anybody for that matter. If he doesn't then it is reasonable for pre to stay away rather than go through the torture.
In real life situations, we do have mohini's who are vile, but it's problematic when your partner doesn't give it back. This is something that I have seen from my experience. When you have someone always for you, then you can face any number of mohini's.
At the end, it's all about maintaining relations, not finding ways to break it off especially when your life is so dependent on each other !!