i feel nanu will be the main culprit which meenu is even unaware
might be nanu never liked mehul and he seen approriate time and created mu in between couple by charging mehul with fraud but mehul was innocent and meenu even is unaware
i feel the raaz will open and meenu and abir will get biggest jhatka but will forgive nanu eventually and mehul will reunite
anyway i now feel nanu is the culprit which will shock even we audience
i feel this as right now i dont think major drama is going to happen as they just want to unite mehul with abir
and if this time even meenu will be prooved culprit then audience or abir will never accept her so she might even term victim of dhokha
might after seeing drama nanu will reveal his hate for mehul to everyone and tell meenu all truth which will leave even meenu feel betrayed and thats why nanu is most worried for mehul