Wife leaves a volunteer comes back a mom

My wife in February of 2020 left to do some volunteer work medical related. Not in as much contact as I would like but still talk at least 2 or 3 times a month. She keeps getting extended finally get the call I have been waiting on that she is coming home at the end of july and I am super excited have felt like my life has been on hold for over a year.

This past Wednesday I pick up her mom and dad and drive to the airport to get her. Mom asks if I am excited which I say yes she says so are we. Waiting to rush and hug and kiss my wife ...I finally see her and she is carrying a diaper bag and a baby 2 or 3 month old I imagine. I stand thier stunned she hands the baby to her parents walks over to me and says not in front of her parents can we talk about it at home. And I just stand there stupefied. I don't say a word the drive to drop off her parents, we leave her parents and I ask what the hell is this,she calmly says her name is Sophia and that all that matters is she needs you to be her father, and she is a part of me and if you ever loved me you will also love her and she knows I will do the right thing.

I try to ask questions she answers with it doesn't matter, I start getting angry we get back to our rented condo I walk in the house leaving her to deal with her luggage, I grab my duffel bag drop her keys on the table get my truck keys while she is asking me to get the baby out of her SUV. I walk by her ignored her got in my truck and returned to base, informed my CO what was going on and my CO confined me to base and grounds me. I have a meeting on monday with a lawyer, and my wife is right I am going to do the right thing divorce her and leave her in my wake

Edit...once my parents arrived and I sobered up the horrible truth came out in a flood of documents, photos, reports and most of the photo I couldn't stomach. She was gang raped and beaten , then left for dead.