Rogue Operator by Patricia D. Eddy

Nomar
Do the job. Free the high-value target from a compound in Afghanistan and get out. Simple, right? Until I saw her. She begged me for help. I didn’t think. Grabbed her and her kid and ran. FUBAR didn’t even come close to covering what happened next.
And then…I disappeared. It doesn’t matter that I had no choice. That the President of the United States ordered me to “do the job.” I still abandoned them. When she’s in trouble, I can’t stay away. But how can I convince her my darkness will destroy her?

Lisette
I lived a nightmare for ten years. Cut off from my family, constantly afraid, and unable to escape. My only joy came from my son. His father wanted to turn him into a killer. But then a man stole into our compound in the middle of the night to free another and became our salvation.
He disappeared before we had a chance at something…more. But when a new threat comes for my son, he returns, and suddenly, I realize the truth. I’ve loved him for three years. But will we survive long enough to find our happy ever after? Or will the country that nearly killed me finally finish the job?

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Rogue Operator is the fifth book in the Gone Rogue Series. It can be read as a complete standalone, though characters from earlier books in the series often show up in later books.