Therapy Dog

[Guest Inota]

Looking for an old story I remember. The premise was a law passed that mandated certain people need to get therapy or support animals. The main character, an intelligent girl, qualifies for it. Her parents get her a dog that was genetically modified to try and make dog girls, but it made it intelligent as well. The law dictates that the animal cannot be stopped from doing its duties, and uses this to fuck her. The 3 scenes I remember are it licking her during class, fucking her in her bed, and her convincing it to fuck her to get out of gym class