i know she works out of somewhere else with other ladies and this would be her home as i come and go at my place all the time so would not be very good for her business.
Then think of all of this
1. Was it a good punt when you seen her or not. Obviously not that good as you haven't seen her since.
2. Do you trust her to know your real name and other details about you, if she ever gets pissed she could tell your girlfriend/wife/family how she knows you?
3. Many prostitutes are complete and utter train wrecks. So ask yourself do you want a train wreck living with you?
4. Following on from that. Most prostitutes seem to go for the biggest violent chavs there is as their boyfriends. Do you want someone like that in your house too as her boyfriend will be coming over.
5. Prostitutes get paid a lot, but are often not sensible with money, don't accept responsibilities. So there is a good chance she will run off and not pay the rent one random month. Or just give you a sob story over why she cannot pay that month but expect to stay there for free (her mother is sick/dying and needs to send it all back to her etc).
6. She will have possibly those other prostitute friends she works with all come round to the house too as her friends to hang out with. This is either a good thing, or a bad thing as they will all know your real name too. And see your wife/girlfriend too. So you have to trust al of them for discretion.
7. Even if she does keep schtum on how you know each other. If it ever comes out innocently what she does for a living. Your wife/girlfriend will automatically think you've been booking her and this is why you let her live there.
Basically it all comes down to. Did you enjoy the punt with her so much you would want to live with her and accept all the risks? If you didn't get someone else to rent the room to.
Isn't it only a brothel if more than one girl is working from there ?
You are allowing your premises to be used for selling sex by a girl. It can be iffy as he could be classed in the eyes of the law as her 'pimp' and the flat he is letting her use to do it as a brothel.