Nails in the ass and the mistress makes herself comfortable 0
Nails in the ass and the mistress makes herself comfortable 1
Nails in the ass and the mistress makes herself comfortable 2

 
Usually it 's just nice for the slaves when his mistress makes himself comfortable and her horny boots on the slave stores but please not with nails in the ass . that's hard and you can see like the slave tries the ass getting pretty far away from the nail to keep the board.