Well, it could be a really cute story. Maybe your dog was showing affection. It might have been excited to see you and licking your hand was its way of greeting you.
You could try to keep the dog out of the bedroom when your wife is sleeping. If the dog has a habit of getting close to people while they're sleeping, it might be because it's seeking attention or is curious. You can provide the dog with enough exercise and toys during the day so that it's less likely to bother your sleeping wife.
My dog has this really cute habit of licking my hands. It's as if it's trying to comfort me or just be close. It might be its way of saying 'I'm here for you.' Whenever I'm sad or just sitting around, those little licks are so heartwarming. And it's not just about the physical act, but the bond it represents between us. It shows how much the dog trusts me and wants to be part of my life.
There are some fanfic platforms where you might find such stories. Archive of Our Own (AO3) has a wide variety of fanfics. You can search using the tags like 'dog' and 'female reader' and then filter for the ones that are rated as general or teen audiences. Another option could be FanFiction.net, but you need to be more careful in searching and screening through the results to find appropriate ones.
It depends on creating a vivid and sensual setting. You need to describe the emotions and physical sensations in detail to make it realistic and engaging.
Yes, there could be. For example, a story where a dog licks a person who has passed out drunk to get help. Maybe the dog senses something is wrong and tries to wake the person up by licking them, and then the neighbors see the dog's behavior and come to the rescue.