Forbidden Love (The Forbidden #2)
Aimee Shaye

Suzanne DeAngelo, a customer service representative for Lightning Mobile, a branch of the Stonewell Corps, is an edgy girl who will try anything once. When she expresses interest in Derrick, he decides to go along with it, but on two conditions: his shirt doesn't come off, and she can only address him as Mr. White or Sir.
One night in the throes of passion, Derrick loses himself...Will he admit his love for Suzanne or will he walk away and leave her broken?