Adultery The Defeat of Poroma

[Realman12]

May be she was trapped 
he play some game trick in part

I think you are thinking in the correct direction, unless there is trapping and blackmailing of Poroma, simply wanting to have sex with Rahul she would have easily done it behind the back of her husband! If she wanted to be with Rahul she would simply divorce her husband and move on! Why would she be determined to publicly humiliating both herself and her husband, and destroying her family like this?