1) G mom will know about Veera and Maya's Chaal -- This will take some time.. Once Veera realises her mistake, she will confess herself in front of Nihaal and secretly everybody would be there..
3) Heer will figure out G mom's motive -- Very difficult to say, next two weeks, probably
4) Lallu is playing a secret agent to expose W1, W2, and W3 -- Not sure about Lallu but I think Nihaal will bring Veera at the right track very soon.. The way he is going, its amazing and it will bring her on the right track, in two weeks time..
I know I am sounding a bit too much of optimistic, but thats what I feel..