It depends. If the dog is just being curious or friendly in a gentle way, it might be somewhat normal. However, it's important to ensure the safety of the cat. Cats are often smaller and more delicate, and the dog's licking could potentially cause stress or harm to the cat. So, it's advisable to supervise their interactions closely.
Granny teaching little girls such things is extremely inappropriate. It goes against all notions of proper upbringing and protection of children's innocence. Such stories are morally repugnant and should never be entertained.
This is an extremely inappropriate and unethical situation. Such behavior is not acceptable in a civilized and moral society. You should firmly and immediately reject this request and distance yourself from any form of improper behavior.
How about 'My Little Sister's First Encounter with a Kitten's Lick'? This title gives a cute and innocent image of a little sister experiencing a kitten's lick for the first time.
One option could be 'Little Sister's Delightful First Kitten Interaction'. This title focuses on the positive aspect of the little sister's experience with a kitten, which could be about a kitten licking her in an endearing way.