Technically you should be called a whore, but then again since you don’t actually charge these men for using your body, you can be termed a bitch, an insatiable one perhaps.
As long as you have protected sex with any number of men, you wouldn’t get into any trouble, but you’ll have to restrict yourself from engaging in oral sex, kissing and smooching, as oral sex has a highest probability of transmitting STD’s/STI’s and exchanging kisses can often result in the transmission if there happens to be a cut or a wound on the tongue, so going for t with a complete stranger isn’t advised.
Moving on to your next query which revolves around the question of whether it is good or not to have sex for the purpose of business; unless you get something out of it, say money, expensive jewellery, cosmetics etc......it isn’t good to go for sex. Now, I wouldn’t take the pain of educating you on marriage morals and staying loyal for your husband and all that crap, because for you, you’ve stopped thinking about your useless husband right at the moment you had stepped into an affair.
Usually guys dig at marrying virgin girls as they think they are very innocent, possess a good character, etc........ but not a single guy thinks about the hidden slut in these girls. I‘m pretty sure you were a naive, innocent virgin bride at the time of your marriage, but now you’ve turned into this insatiable whore/bitch.
So, have sex by demanding money from your clients, why do you want to lose money at something which you’re good at? As for your marriage, I’m sure you would project the image of a loyal and obedient wife for your husband, that idiot wouldn’t know his wife is a slut.