I’m really vexed about this sort of situation. About 20 years ago I visited a SP about six times in a rented flat (Air BnB these days). At the end of one session she said she was done for the day and was going home. I asked where home was and,it happened to be on the route back to my place, I offered a lift (she would normally have taken the train), When we got to her place, she asked me in for a drink. I ended up staying the night, following which we met 2/3 times a month over the next 10 years. We went on holidays, long weekends, one nighters. The costs were always shared - never any “fees”. But….all the time, she was still working. Many a time, I would be with her at her home and she’d take a call, accept a booking, and disappear for a couple of hours to her working apartment. So, by all means get involved, but only if you can deal with the fact that they are never likely to be faithful to you alone and that an hour before they have been giving a paying punter what they give you for free,