She's worked under a few names.
Firstly as Gemma at Notorious, followed by Summer and now Logan, quite possibly a few more that I'm not aware of.
She is Savannah's cousin and until recently they did duos at a weekend from Logan's place in Gateshead.
But if she was hiding behind the door before revealing who she was then anyone who had a change of mind just has to turn tail and walk out, no need to stay at all and no harm done really. She'd probably blacklist the client but that shouldn't be a problem either.