A couple of things to share:
1) Love the motorcycle helmet picture!
2) If you can keep "Bitter Apple" within reach you can spray it on the area that the kitten is trying to suckle. It's specifically for pets, won't hurt them but they act like they are dying if they get it in their mouths. Great way to teach them not to bite. (We use it with ferrets and have used it with puppies.) You can get it at most any pet store.
3) This is a great education point: if your cute puppy/kitten or whatever is doing any behavior - you need to think about whether you want that same behavior when that animal grows up. If not... stop it right now. Example: the adorable little fuzzball that's five pounds is so sweet to have in your lap -- then he grows up into a 150 lb. Newfoundland ... not so sweet. So, we don't let them on our laps ever.
4) One of our male kitties (who's now three years old) has suckled on our female Pomeranian since he was a kitten. She lets him do it. He lost his momma when he was about seven weeks old and our dog became his surrogate mom. The rest of the litter has never done that.
cheapcheap_jeepjeep: you cannot make a momma animal be a momma. You can encourage her though and she may 'learn' to be one. Is she allowing her baby to suckle? If yes and she's coming back to the baby regularily then I would just let her be for now and see if she starts to spend more time with her kitten. You can always put her in a cage (like a dog kennel, airline crate) so she can't get away from her kitten and let her out once in a while to give her a break from her kitten.
The bigger concern is if she isn't letting the kitten nurse every two to three hours. You will need to keep them together (in a cage) and hold the kitten to momma yourself to make sure the kitten is getting food. You'll have to make sure the kitten is suckling regularily even if it means you have to hold them together to make it happen. (We had to do that with ferrets once. We held the babies to momma for almost two days, around the clock, every three hours, and then momma finally understood and took over the job herself.) If momma fights you and you just can't get it to happen then you are going to become momma and will have to bottle feed that kitten. If you have to become momma there is more to it than just feeding and you will want to do some research on your part (for example: you have to rub the kittens bottom to stimulate them to poo! Fun!)
Hope that helps ... good luck.