Stepbrother's Good Girl Series by Olivia Hawthorne

I've tried all my life to be the perfect daughter. For two years, Grace Atkins has lived under the same roof as her bad-boy stepbrother, Gavin Thompson. Grace was the perfect daughter and never did anything wrong, but on one fateful night, she's home alone with Gavin and learns that he's determined to have all of her firsts. Will Grace be able to resist Gavin? Or will Gavin win over his good girl sister.

I've tried all my life to be the perfect daughter. For two years, Grace Atkins has lived under the same roof as her bad-boy stepbrother, Gavin Thompson. Grace was the perfect daughter and never did anything wrong, but on one fateful night, she's home alone with Gavin and learns that he's determined to have all of her firsts. Will Grace be able to resist Gavin? Or will Gavin win over his good girl sister.

I've tried all my life to be the perfect daughter. For two years, Grace Atkins has lived under the same roof as her bad-boy stepbrother, Gavin Thompson. Grace was the perfect daughter and never did anything wrong, but on one fateful night, she's home alone with Gavin and learns that he's determined to have all of her firsts. Will Grace be able to resist Gavin? Or will Gavin win over his good girl sister.