Most normal people would criticise the way she lives her life. He has more reason to because she's effecting his children.
The 'he knew how she lives her life' thing is just nonsense.
I think it's extremely pertinent.
He knew what she was like and happily embraced the lifestyle. He knew she had a history, had made money out of her body and sexual image, knew she had a potty mouth, knew she was in a relationship at the time and still went on and married her.