The Black Door by Charlotte Howard

Imogen Pearce is a single mum of four children and fast approaching 40, she works at Ryedale Incorporated where she has to battle a younger and smarter generation to get to where she wants to go. If that means taking on the account of Cherry and Sean Rubin’s adult shop, then she will.
But what happens when Imogen discovers the private club that they run at the back? And what happens when she realizes she knows quite a few members?
Things get even more complicated when she starts to fall for her boss, Cal Ryedale…