An intended share is NOT to cause jealousy. Nor is pimping someone out.
ignore the jealousy bit, Only confuses. NTR literally means "To be taken from." characters personal feelings are irrelevant, until you get to them enjoying it, in which it becomes Netorase. (since that is big enough to be its own labelled fetish). But is still under NTR.
So if they the MCs women in any way.... it is technically NTR. Pimping, is where you pimp out someone that isn't yours. If they yours well yeah... that kinda be willful NTR or if MC enjoys that fact, then it's Netorase.
But to avoid confusing when it comes to things that fall under NTR or Netorase but have their own genre name, the NTR and/or Netorase is dropped. E.g. Sharing, MMF threesomes, swinging etc. These terms don't usually have NTR tag (unless it is in there strongly), even though they technically fit the definition... since it is broad af.
As for this, well, they are only strippers and not prostitutes, so them doing other people other than MC would be NTR. (unless MC actually starts whoring them after building a relationship then that is sharing and prostitution).