By that logic if vedashree loved Ansh
she wouldn't have forced him to marry for his own good apparently despite showing clear signs (if she bothered to pay attention) of being attracted to another girl.
If she loved him she would have told him the truth of his parentage rather than put him in danger in the first place.
But she chose not to because she feared him hating her rather than saving him. Thats selfish love right there !
Her fear of losing him to another women was stronger than concern for his safety.
There are different shades of love. Love can be selfish and possessive. It can be negative Depends on the person.
Haven't you heard the expression "because even the devil loves her kids" It applies here. Mohana has shown many signs that despite all that greed for power deep down she does cares for both her children and feels the pain of their separation.
Today despite being in danger from that patal ketki she risked her life and the scorn of her children by exposing herself as a dayan. Not to mention Ansh will pretty soon put two and two together and figure out she turned his mom into a statue.
So its not a calculated move but a loss.