Question about a cat!?

  I have a 2 year old cat and a 2 month old kitten, non related in any way. Anyways the younger cat sucks on my older cats nipples, should I do something about that? I don't know what to do, I think it's disgusting.
If the 2-year-old is fine with it, leave them alone. The older cat has taken on a parental role with the little one. Kittens will often suck on their mothers' nipples until the age of 13 weeks or so, after the milk has dried up, if the mother will allow it. It gives them comfort. Kittens that are separated from their mothers too early (before 12 weeks of age) will often continue sucking on anything they can even into adulthood. It's better that your kitten get through that stage with another cat rather than sucking on blankets or earlobes.
I have a 1 month old cat that sucks on my 2 year old MALE cats nipples. He only does it for a few minutes, and after he realizes that he's not getting any milk he stops. This happenes when the kitten is separated from mom way to early. Make sure you are giving your kitten bottled kitten milk if it is 8 weeks or younger. Other than that, it will stop on its own.
I think your kitten is probably feeling insecure. Maybe try to seperate them from each other for a little while. In my opinion, I think that they will be fine together, even though it may be gross. I bet your kitten will grow out of it. Best Wishes!
get them spayed