Wild Side

Third book in the Rose Hill series (can be read as a standalone, though you'll get more from it if you've read the earlier books).

After the devastating death of her sister, Tabitha Garrison finds herself fighting to protect and care for her young nephew. A complicated legal situation forces her into an arrangement she never imagined: a marriage of convenience with Rhys Dupris, a brooding, secretive man she neither trusts nor particularly likes.