To being with this seems like just another statement from her (as audience, we feel that she has 'gone back' on so many of her 'tall claim' statements that we have stopped giving any attention to her words!!!) But, on closer examination we find that THIS is another matter at the core of Preeto : "Sachcha dil". Preeto has said many times "Jo kiya / kaha dil se kiya / kaha" She is a person who follows her heart. But her heart is misguiding her or let us say that she is blind to her own heart.
We all were disappointed and disheartened by her decision to say yes to Sunny's proposal we questioned her integrity and love...How can she? (Rajbeer has been asking her that how can she ask & expect him to go to another girl :"Kya tum mera haath chod ke kisi aur ke pass ja sakti ho?" She says "Pata nahi").
Preeto's statement to NA explained something to us...She thinks and believes that she can give honesty to her relationship & marriage with Sunny... She didn't want to go to any other man except for Rajbeer (as seen in her resistance to NA's demand)...but under extreem pressure, she took this decision with a 'bharosa' that she can nibhao this rishta with "sachcha dil"...
The day she realises that she cannot do this...that it is beyond her...That day she will get up and go and tell this to Sunny...Because yes, you are all right - Preeto is an extreemly honest girl...She will never dupe anyone... Today she thinks she can be true and fair to Sunny... The day she realises she cannot be, she will rectify this... Today she is being mis-guided by her 'mind' (yes! we say mind and not heart, because as the fakir said "dil kabhi jhoot nahi bolta hai, dil mein rabb basta hai)... Today the clutter of her mind is unable to let her listen to the voice of her heart...
As we said in another comment, The day Preeto examines her heart...she will find Rajbeer seated there firmly...never to be removed...occupying such a large space that there is no place left for anyone else...THAT day she will know where her heart is... That will be the day of her awakening...Today Rajbeer is hidden behingd the thick viels of her own fears and guilts... in the procss of her realisation and awakening, her first step will be to address those fears and once having removed those, she will see HIM...
We would also like to add that this "Sachche dil se rishta nibhana" may be the reason she has been saying no to Rajbeer also all this time...She felt that she would always be distracted to the duties twards her family and not give Rajbeer a "sachche dil ka rishta" that she had been saying no to him..She never denied that she doesn't love him... When Beeji spoke to her, she felt released of the burden of her "obligations" of duty and she listened to her heart and decided to say the yes her heart had been wanting to say for a long time...