Final Offer Book by Lauren Asher

Callahan
I’m the Kane brother everyone gossips about behind closed doors.
Trust fund brat. Washed-up athlete. High-functioning alcoholic.
No one knows the real me but her.
Lana Castillo—my childhood best friend and the only woman I ever loved.
When I broke her heart six years ago, I promised to never return to Lake Wisteria.
I kept my word until my grandfather’s will changed everything.
To receive my inheritance, I was tasked with spending a summer at the family lake house before selling it.