One Love by K.A. Berg

Sebastian –

Devin warned me what would happen if we kept sneaking around together, but I was sure I could control it.
I was being selfish when it came to her. I wanted her and that was it. My mind was set and I was on the path to winning her heart, until everything blew up in our faces.
I caused pain to the one woman I promised to protect, and now I have to figure out how to make it all right.
There’s nothing worse than seeing the look of fear on her face as the seriousness of our reality falls down on her instead of me. One thing no one counted on, though, was just far I’d go to save her. I’d walk through fire to keep Devin from living out her worst nightmare.

Devin –

I’ve never felt so many emotions for one person before in my life. Love. Anger. Sadness. Jealousy. It’s all there. It’s a constant up and down when it comes to Sebastian and me. He’s confident he can fix it all, while I’m still trying to get over my own fears.
Except those fear become reality in the most terrifying way.
We’ve been through things most people only read about.
All we want to do is love each other, but someone else has other, more gruesome, plans for us.

This is book three of three.