The handling isn't like an extremely strict rule that you're breaking, but it is just recommended to not handle a new snake in a new enclosure until they take at least one or two (which is better) meals consistently. But if she was with your uncle in the same enclosure, same setup, and the ride home was only a few minutes or something, plus she already ate a meal with you... I don't think there's much of a problem!
If she ends up refusing a meal later on though, then you know to avoid handling her for a couple weeks until she takes a couple meals for you consistently.
If that's your only issue and your husbandry and equipment is all correct, sounds like everything's fine to me.
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