Going for It by Janelle Denison

Getting engaged should be one of the happiest days of any girl’s life. Except when her sex life seems to crash and burn before she can even say, “I do.” Concerned she might not even make it to the alter, Leah Burton seeks the help of Jace Rutledge, her brother’s best friend and the one guy she’s been able to count on. And the one she’s always secretly wanted.
Hopeful he can teach her some secrets she can use in the bedroom, while satisfying her desires in the process, Leah convinces herself she’ll be able to keep her feelings safely tucked away. Unfortunately, her heart doesn’t get the memo. When things begin to heat up between Leah and Jace, her marriage concerns become less about sex and more about whether she’s making a big mistake with the wrong man when the right one has been there all along.