Carlan, Audrey (Novelist). Trinity

Series information from goodreads.com

The fire burned Kathleen-- figuratively, emotionally, and physically. The scars that ran down her arm, ribs, and side have been smoothed through grafts, but sometimes what can't be seen can't be healed. The fire obliterated her talent, and seared the connection with the man Kat loved. To this day Carson still looks at Kat with fire in his eyes. The problem now is, she just may have waited too long to fight for him, for a future together

Sequel to: Life

"Warning: This book is designed for audiences 18+ due to language, graphic sexual content, and themes that some may find disturbing and may cause trigger reactions. This story is meant only for adults as defined by the laws of the country where you made your purchase. Store your books and e-books carefully where they cannot be accessed by younger readers." -- page [6]