I read the blurb of a historical romance sometime ago but didn't save the name of the book and dont remember the author's name.

This might not be exactly right but it was something along the lines of:

A woman was being forced into an arranged marriage by her parents and she thinks its an old man (not sure about that part) so she sneaks out of the house and goes to a mascaraed where she meets a man and sleeps with him and the next morning when her finance arrives its the same man.

I think the book was set in the UK around victorian time.

The story is something along those lines i dont really remember it compleatly and this is the only info i have hope it helps though.