Uncovering Seven by Annie Miller

MI6 Operative Jude “Seven” Butler left everything he loved and joined an elite group of assassins in the United States. Why? He had nothing keeping him in England, not since he believed he was responsible for the death of the woman he loved.
When a mission went sideways, Seven relied on no one to have his back. Not his family, not his MI6 partner, and most definitely not the agency. Leaving the past in the past where it belonged, Seven believed nothing would ever make him return to his motherland. Then one text message changed everything.
Aria McClaire had been keeping a secret for years. She let everyone believe she was dead, including the man she loved and the child she bore. Until the picture changed everything.
The minute the flash went off, she knew her secrets were going to be revealed, and the only one who could save her and their daughter was the man she left to take the fall for her death.