Stuffs her "huge" naturals into a bra that's clearly a few sizes too small and the displacement is not what would happen if they were "huge", looks like she's faking. Consider the other 2 shots don't show her chest and I'm thinking "Next!".
She's sporting Cs possibly Ds at most.
She could well be stretching the truth on a few details (bust size, age, maybe services), but for some reason strikes me as genuine. I'm thinking it could be a very naïve girl testing the waters.
Worthy TOFTT suggestion at £80 for a fairly attractive young woman (miscalculated rate of £180 for two hrs could be a sign of why she's not doing a more conventional job).