Mischief by Moonlight by Maryse Dawson

In England, 1789, Gabrielle Baudrey was living quietly, or so it seemed, out in the country with her parents. In the day, she acted the dutiful daughter but by night, she secretly became a highwayman, robbing the rich to give to the poor.

Now everything was about to change with the arrival of a suitor. Talk, dark and handsome, Nicholas Forrester was an extremely astute man, and as soon as he clapped eyes on Gabrielle, he
knew she was going to be trouble...

Gabrielle tries to outwit him but soon discovers that Nicholas is unlike her former, rejected suitors. He has no compulsion about throwing her over his lap and dishing out a sound spanking
when needed.

Can she marry such a man, and if so, would she be able to carry on her nocturnal adventures? Would she even dare?