such stories pretty common nowadays.
whatever the price, your best outcome is to end this relationship / marriage.
After that, can start your life anew.
1 to 2 yrs later, U'll be glad u took that step to end it.
Yes will lose a lot in divorce. Minimise the loss, gather evidence of her adultery activities. Submit these in court, make judge more sympathetic to u, make u pay less.
After that just move on with your life.
Maybe u still love her and wanna savage this.
But it will never be the same again.
And i dont believe she hasnt had any sex with other guy/guys too.
Try having sex with her and see her mood. Probably she wont even agree to do it with u ever again.