There are people who will see evil even in the Son of God having his feet washed by a penitent woman. Could you imagine what Politico would say about Cain having his feet washed and dried by the tears and hair of a woman? lol.
But that was the Son of God - the sinless one, who alone is able to love perfectly and purely.
And the Pharisees called Him a friend of prostitutes and tax collectors. “Doesn’t He know what kind of a woman is touching him?”
For some reason the Son of God cared more about helping that woman than about helping Himself and His own reputation. Would He meet the test of what it means to “not even give the appearance of evil”?
Just talking alone with the Samaritan woman at the well would have put Jesus WAY on the bad side of the society He lived in. It didn’t stop Him. Why do you think that is? Didn’t He care that He could be giving somebody a reason to think badly of Him?
The fact is that Cain hid this from his wife for 13 years and destroyed his own credibility.