XxxDaisy, I have been in threesomes with her, she will absolutely engage, she is not gay for pay, £500 should get you a few hours with her, which will be perfect for your GF if it’s her first time with another woman, to relax and enjoy it.
Unfortunately from my experience 90% off girls who mark their profile as ‘bi’ are absolutely bullshitting.
Me and the missus have had many threesomes, over the years, and I still maintain it was due to me pushing the boat out for a superb first time experience, dinner, drinks, good hotel, candles, music, new (expensive) underwear, the whole nine yards.
External Link/Members OnlyGood luck sir