Little girl who gets warm and fuzzy when her dog randomly licks her neck and chest lets him lick a bit lower... weeks later she has a routine of getting eaten out by him every day and she slowly starts to touch him back, unable to keep her hands away from that thick red cock.
Soon, she's putting it in her mouth, sucking the pointed tip until he cums inside. The feeling overwhelms her and she can only imagine how that would feel down there... inside her special place...
But would it even fit?