queriest have the solution of this issue which he share with this forum through thread. in his own thread ::.
Dear Born Fighter and Rocky Smith,
Thank you for your valuable comments. Futherly how about planning in such a manner where M2 will not at all know about M1. Even in worst case, if M2 will come to know then how about planning this way:
M1 is living in a two storeyed bungalow with separate enty for the first floor. M1's parents will make a rent agreement by the name of F2. So legally and technically F2 is staying there as a tenant and it will be difficult for any one to prove adultery or live in relationship.