The reason is that kissing scenes are seen in the movie; their parents do not like that their daughter does all this.
But Mrunal Thakur has also said that she has talked to her parents about this; after all, how long will they continue to accept the movie because of the kissing scene?
Mrunal Thakur will now do kissing scenes, and if she likes the script of any movie she gets, she will say yes.
Nowadays, there is more demand for kissing scenes in movies, and people do not like this. If Mrinal Thakur continues to deny all this, then her career will not work.