Chance is chancy. You might have another Aspie, you might not. You'd know when you'd know, of course, but it's not a sure thing or an impossibility.
As for the chances that your son, once he grows up and gets married, will have Aspie children, it will depend on any number of factors. By then, though, we might know for sure what causes autism in all instances, and we'll know exactly what autism is. But again, that itself is a chance.
If you want another child, don't let doubts cloud your mind; Just do what you think is right.
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FOUR
Four is the only number which is itself has the same number of letters as it itself is.