My son is too young yet, but I have to say that I cannot tell a lie, but my aspie husband is a horrible liar. I haven't yet figured out if he is dellusional or what. Sometimes he thinks we have had conversations that we never have. Sometimes he will deny things that he's said, and he really seems to believe them. ??? Not sure if he has other issues going on. But he can make up a good lie in an instant, without even blinking.
I, on the other hand, who consider myself borderline aspie, cannot tell a lie at all. It will absolutely bug me to no end. I guess it has something to do with the hyperfocus thing. Well, my husband has an ADD dx, so he probably can't focus long enough to remember that he lied from one minute to the next, now that I think about it.