Yes, there is no tax or reporting consequences for recipients of gifts.
You are also correct that she may need to file a gift tax return. It sounds like it was a gift from your mother and not your father so the money was never his to have to report as a gift.
If your mother does file a gift tax return, just know that there is probably no tax due, unless there was many millions gifted to you in the account.
[Updated 2/21/2020 | 2:35 PST]
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