Looks like it could be legit to me, only because of the request to do shared content, most fakes don't ask that. The tone also sounds very english and she has no PG scam going on. What may not be legit are the prices and services. £80/90 is on the lower end of the spectrum generally so you'll probably have to pay more on services or accept less.
She could be fulfilling a fantasy part time and the commitment might not be there.
Who knows?
HMD