Toy of the law

Vi always came to you like this, fresh from work in the dead of night. You never complained, you feared doing so might cause her fist to visit you in the night instead. Already out of her work gear, she was dressed in her usual toss-on shirt and a pair of jeans, and she always started the same way. "I'm here for my nightly, get this junk off'a me." and you complied. When it had started, you could hardly move, afraid to make a misstep that would cost you dearly, but you had learned the bounds she would let you go in, you knew now what was expected of you.
Starting with the pants, as she preferred, you reached around and unbuttoned it, foregoing the zipper to begin pulling them down, the hardwork coming from her hips, before they fell to the ground easily. Then, you moved up, undoing the buttons on her shirt slowly, making sure you didn't miss a single one. Last time a button snapped off, she had been in a fury you didn't want to experience again.
The cloth falling down her shoulders and onto the ground, you were greeted by her underwear, it was always an interesting choice to see what she had gone with. Today, she had opted for something skimpier. A lacier than usual black bra, and a pair of black string panties. Unhooking the bra carefully, you pulled the straps off of her shoulders, letting it fall on it's own before preoccupying yourself with the largest hurdle. You knew it all boiled down to this, and getting down on your knees, you could almost see her smiling as you finally undid the strings on the sides of her panties, the cloth falling to the ground with ease. You could remember the first time you did it, your heart was beating like mad, your palms were sweaty, and when you finally got a view of her full, fantastic ass, you had an erection that could burst through steel. All these things were still true, but you knew there was something to be expected. She had let you explore on your own before, but nowadays she took the lead, that was the kind of woman she was. In the moment the thought crossed your mind, she pushed her ass to your face, pushing you down before taking her spot mounted on your face. It was hard to breathe, but you managed, searching around with your tongue. You knew exactly what she wanted, she taught you well. The first time, you had stubbornly tried to stick it into her pussy, desperately hoping for that, but she eventually got the message through where your tongue belonged. "That's right, good boy." You heard her call down as your tongue found the rim of her asshole, snaking just the tip in as you pushed working to loosen her up. She moaned appreciatively, you had learned what she liked, and after the first few times, you learned to like it as well. "Don't be stingy now lover boy.." she complained, as you remembered your hands, quickly raising them and grabbing her bottom, kneading and squeezing it as you worked her asshole with your tongue. She kept it clean, especially for you, so that you could service her. Similarly, you kept boxers on at night, just so she could see how much you appreciated it. As your began pushing your tongue in deeper, you heard her sigh, certain that she had a look of pleasure on her face, and that set you on fire. You sped up the pace, the rhythm, working your tongue in further as you licked into her, up and down. Hearing her moan a bit louder, you felt her enthusiasm as she began pushing her ass onto your face even more, grinding it into you. Her breathing was ragged, and that encouraged you, almost smothered under her ass, you massaged it as you licked even more frantically than before, working your tongue in and out as well, fucking her asshole with it. "Yes!" she moaned as you felt her body shake above you, a familiar wetness spread across your neck. As she sat up, you gasped for air, filling your lungs again while savoring the scent and flavors she left behind, a bit of her fluids dripping onto your face as she dressed herself up and left, without a word as usual.

That's fine, after all, she'd be back for you again tomorrow night.