Hard and painful full-weight facesitting

Description: Today i came up with a very mean idea for the slave - i'll sit down on his face with my full weight, with my legs extended over his body - to not only smother him under my gorgeous ass but also hurt him a lot in the process. of course, i'll let him breathe ... every now and then ... but not too often and not too long, before i sit down on his face with my full weight again! and he better does his best to be a good seat pad for his mistress - or i might come up with an even more painful punishment ... and he knows me well enough to prevent that at all costs!