Disestablishing Paternity: Found Out I'm Not the Father. Married and Have a Foreign Wife

My question involves paternity law for the State of: South Carolina

I am American & met my wife in Indonesia. We were dating for 6 months before she told me she was pregnant. We married 6 months later while she was pregnant. Our baby is now 11 months old. I just did a non-legal paternity test without her & found out I’m 0% the father. ZERO.

I would like to never be a part of her or the child again. The baby's not mine & my wife ruined my life.

Our baby is Indonesian-American & has her US passport.
How to cancel that? Also, I have paperwork bringing my wife to USA, I need to cancel that too.

What would you suggest I do? What’s typical? Is there a timeline of events you recommend?

I haven’t told her that I know yet, I’m playing it cool until I can figure out my next steps.
I don’t care to adopt the baby or really ever talk to her again. 

Thanks

Disestablishing Paternity: Found Out I'm Not the Father. Married and Have a Foreign Wife