You need to be careful as to what you volunteer to tell them.  If you openly admitted, assuming that they all know, it might not go well.  If you don't show your face on these adverts, especially, how do they know?  Personally, if I were you, I would insist on informing you fully as to who reported, then would be much easier to plan what to say.  Get some facts.  Sometimes, if you are too scared, they will walk all over you.  Stand your ground if you can, have a friend with you who would give you support when you see the social worker.  Lots of women fool around, so?   It would be better if your occupation won't go into the record.

I think it  as viva street. I will ask but don't think she will tell me. I'm just worried that it will be used against me I'm supposed to be having my son back 80% of the time soon. My mum has him this much now but might not want me to have him back when she finds out.

Speak to the social worker before your meeting and say you feel supported by your mother at present, and if she were to find out this would ruin your relationship, which would affect your child too. What is there to be achieved by telling her?! You know your mother better than they do, and you know how she's likely to react. It doesn't sound like there's any benefit to her knowing. I hope all goes well for you 

Oh no!! I had only just seen this thread! My advice would have been 'Deny deny deny!'
I know it's a lot easier to be honest especially when technically we are not doing anything wrong, but when there is a child present it's the local authority whos duty is to safeguard the said child and once they get involved it will be difficult to shake them off.

I'm not entirely sure, but I believe they can't inform your mum without your consent about your work. But  it also depends on the current arrangement between yourself and your mum and social services. Also if there are any orders in place. X

1+
It might be worth getting a legal advice.  Best not to deal with this social worker alone.   Hope this gets sorted out well for you.  xx

brothel and massage parours would take more commission than paying for a hotel room, go on booking.com and check out their prices for the area you want and perhaps just start with 1-2days incalls in hotel ?

I asked for advice on hotels here before but didn't get any replies. I think I would worry the hotel would notice people coming and going.

That's why you pick a busy hotel with over 100 bedrooms and preferably a bar and restaurant and conference/meeting rooms as well.

Sourgrapes put a great side to this, reminding you that someone might be concerned about your child. Factual or not, it is all of our responsibility to look out for children.
Guiltypleasure gave great insight and the replies here are helpful and kind.

I would urge you to deny this now and say you don't do it anymore. The SWorker was judgemental. Social Workers are human, some are not judgemental and have real life experience and would be very discreet yet maintain their professional status and advise you NOT to be TOO HONEST. Others don't have a clue. Social services have frightening powers, especially when fuelled by a person who feels they are right because they are a SW.

If you weren't worried about what society thinks about escorting, you would have kept all your face pics up. But you know that not everybody agrees with it, including those who are in a position to make your life very difficult. Please be very selective in what you say and use this forum as an outlet. Social Services are damned if they do and damned if they don't but I can tell you, they will always err on the side of caution. Decisions are not made by one person but Social Workers are very overworked with few resources. I am not one. But I work closely with them and frankly, it scares me the laziness and the attitudes some have. Gives the great ones a bad name.