Concubines, Mistresses, and Prostitutes- Oh My!

Of all the subjects to talk about, why am I talking about this? Because why the heck not. There is, apparently, a difference between prostitute, concubine, and mistress - all in the lense of history. I'm not saying it is right, but I'm not going to argue with the history of the subject and it happened. Just for fun, let's explore this random topic. Definitions first! Mistresses (in our case) are lovers on the side, unmarried. Prostitutes are paid to have sex with anyone. Concubines are almost the same as a mistress, but includes living with their lover. All this in the lense of history is an interesting and scandalous topic. Women have been used for sex often throughout history. I don't like it, but there it is. I read a Phryne Fisher one day and it mentioned concubines were not prostitutes, so I was curious as to what they were, for real. Let's start with Mistresses. Mistresses The actual term did not start out like the definition above. For example, the mistres...