First Hint she gave was - when Ashu told her reason why she should stay away from Amar , she said She dinno that she could be that important to anyone that they could risk their life to be close to her especially when people who claim to love her dun want to be near her.
Leaving Ashu speechless.
Second hint - when Ashu said maybe he is stranger for the house now . On this Nidhi said just coz of distances one does not become stranger.
Third hint was - when DB asks Nidhi to go with Ashu , then Nidhi indirectly questions Ashu If Ashu has come to take her along with him or complaint about her to them.
This is all that I could observe as I couldn't see the episode last night . Only read WU .
If you all have observed anything else then please share.
Also give some ideas to Nidhi ki woh kaun sa hint de ke saiyyan usse ghar le jaane par majboor ho jaaye .