This is only not even not right, it's not even wrong (Wolfgang Pauli). MtDNA Eve wasn't created, she was born to a human mother. The father of her children was a human male also born to a human mother.
So is bestiality worse than incest, then?
Neither mtDNA Eve nor Y-Chromosomal Adam is required to prove that evolution requires bestiality. The first human to evolve did not have his mate already evolved as human. So does bestiality begins with apes as a requirement of evolution.
For
bestiality, the punishment is death.
(Exodus 22:19) "Whoever lies with an animal shall surely be put to death.
incest on the other hand, the severity varies with who you had.
1. adultery, with mother, with daughter-in-law, same-sex - punishment is death
(Leviticus 20:10) 'The man who commits adultery with [another] man's wife, [he] who commits adultery with his neighbor's wife, the adulterer and the adulteress, shall surely be put to death.
2. sister, step-sister - cut off from assembly
(Leviticus 20:17) 'If a man takes his sister, his father's daughter or his mother's daughter, and sees her nakedness and she sees his nakedness, it [is] a wicked thing. And they shall be cut off in the sight of their people. He has uncovered his sister's nakedness. He shall bear his guilt.
3. uncle's wife, brother's wife - childless
(Leviticus 20:20) If a man lies with his uncle's wife, he has uncovered his uncle's nakedness. They shall bear their sin; they shall die childless.
(Leviticus 20:21) If a man takes his brother's wife, it [is] an unclean thing. He has uncovered his brother's nakedness. They shall be childless.
4. with both woman and her mother - burnt with fire
(Leviticus 20:14) If a man marries a woman and her mother, it [is] wickedness. They shall be burned with fire, both he and they, that there may be no wickedness among you.
So, it depends on what you are referring as incest.