Confession of second marriage by my wife

Sir. I am hindu and married for 10 years having one child. My wife found saying to our maid as " This time in my native I enjoyed a lot. He (boyfriend ) used to come in night and khoob pyar kiya daily kiya, My daughter used to sleep in other room with my mother and we used to enjoy in night . My mother does not know that he comes in night. Maid says to her itna hai to shaadi kar lo then wife says ho gaya shaadi mujhe pahle ring pehnaya phir sindoor lagaya temple me" Audia record is available for this, however no pics of second marriage is avl. Her boyfriend and my wife call them husband and wife in their sms chatt. like " good morning my lovely wife " and " good morning handsome husband " etc Pics of chatts avl. Pics of kissing each other is avl. Please guide me what can be done.....and what should I do, Thanks