Don

From m-w.com

mitigating
1: to cause to become less harsh or hostile : mollify 2 a: to make less severe or painful : alleviate b: extenuate

Mitigating in this case means the woman was deceived AND THEN SHE RECOGNIZED she was deceived.  She is acting redemptively.  The man is the opposite, he knows better and still did it and INSTEAD of blaming the serpent, he blames the woman and then God.

In other words, in their current situation, there is hope for the woman to do better next time (if there would ever be a next time or similar time), but not so much for the man, as his view of what happened means he is likely stuck.