Example? In what way is an example needed? Respect is earned, not given, if he doesnt earn her respect then he does not deserve it. Simple as that.
But since you wanted examples... If he doesnt treat her with respect, if he is a selfish ******* whos only interest in her is sex, if he cheats with other women, and so on.
in all these problem , that's refer to her to ask the divorce or stay with him .
if she forgive him it's her problem , if not she should ask the divorce .