everything about this is perfect. the wet spot, the symmetry, the position, everything down to the lace on her stockings and the bows down her back.
all subs should sleep restrained. no exceptions.
some of us like to keep our pets in straight jackets and snugly gagged.
notice this one has her crotch semi-exposed; this is good. a little rub now and then will keep her nice and wet.
then when it is time to use her, stuff her wet panties into her mouth as a treat.