My girlfriend and I were partying very hard on night and basically collapsed in her bed after about 20 minutes of sweaty hard sex. I awoke not long after to something strange, her head and shoulders were slightly rocking into my arm and her pillow. She was on her front and side with a leg up on me and sticking up over her ass cheeks was her dogs ears. He was licking away on her and she was out like a light, I laid there listening to him lapping away at her. I could not take it any longer and pulled my arm out, she did not even stir, just kept breathing away while his nose was buried in her ass cheeks slurping away. My common sense told me to tell him to quit but the horny devil told me to sit up and watch so I sat there watching him go to town cleaning her ass then laying right down and getting as much pussy as he could reach. I was amazed that she did not wake up because he was actually rocking her body pushing his nose as hard as he could against her. After about ten minutes or so he stopped and jumped back down off the bed. When I woke up in the morning she was in the shower so I got up and joined her. She was happy to have slept in and felt pretty good considering the night we had on the town. While we were sitting down having some breakfast I asked her if she slept really good and did she remember anything after we made love last night. She told me no that she pretty much passed out from being tired and drunk. I told her what had happened but told her when I woke up fully and saw what was going on I told him to get off the bed and covered her up. She laughed and told me that he was a little horn dog and was always getting into her panties if she did not pick them up. She did not seem to embarrassed about the licking her part so I asked her if it had ever happened before and was surprised by her honesty when she told me yes. She had in the past just basically let him lick away at her while she masturbated. I laughed but told her that would be awesome to watch some time, she laughed back and smiled at me saying, well maybe.