I don’t believe that my approval or anyone else’s is at all relevant.
My position is that there’s only one person who has the right to decide whether or not it’s acceptable to trade sex for money, and that’s the person entering into the trade. Assuming that all other contractual requirements are met - they’re of legal age and acting of their own free will and so on - it’s just as much their right to trade sex for money as to trade ditch digging or code writing or coffee brewing or meeting taking for money.