Does anyone know the life expectancy of my Tonkenise Cats?

I also have a Tonkinese. They tend to have the usual cat life span, which can mean anything between 12-18 years, with 14-15 as an average. But cats, like humans, don't always neatly fit into the average. Your cat might be feeling old. An exuberant puppy isn't likely her idea of a nice way to spend her 'golden years'.