The fruit is probably a 'nectarine' a peach without fuzz.

Its a nectarine...this happens all the time with seed grown fruit, at least in my yard. I've got two trees out there right now that i thought were peach, turns out they are nectarine... At least east of the Rockies..Nectarines are tough to grow...Brown rot, PC, and every other thing likes to attack them...

Thanks... cant beleive i didnt think of that