My brother, married with two children, has been conducting an affair with a prostitute for several years.
He's left his wife, and while he still wants to have access to his children, he continues to see this woman.
The relationship is clearly destructive and the police have intervened on several occasions.
He's spent huge sums maintaining this relationship, and he's also abusing drugs.
My siblings and others have talked to him many times, trying to get him to end it, but he refuses. Or, he agrees in conversation, and then later reverts to these bad behaviours.
He's run out of friends, and will soon run out of money.
There are many other factors and events to describe.
What can you do with a person who doesn't listen, and who doesn't understand the extent of the damage being done to themselves and those around them?

- Frustrated Brother

You can only be your brother's support when he wants this to happen.
In the meantime, stay in contact whenever possible, and let him know you care.
He already knows you disapprove of his choices, so lectures and reasoning won't bring about change.
He's addicted to drugs and this risky lifestyle; the best you can do is provide information about how and where he can get help, and say that you'll support him through rehabilitation efforts when he's ready.
For yourself and your siblings, as well as his ex-wife and his children, connecting with Al-Anon/Alateen (www.al-anon.alateen.org) would be beneficial for your own support in dealing with him.

I divorced my ex-husband four years ago due to irreconcilable differences.
I allowed him to remain in the home for awhile after the divorce, thinking that he'd get his act together.
However, he continued to ridicule, mock, shame and slander me so outlandishly that he caused me and my children (he's not their father) to seek family therapy. We're now on our own and doing fine.
However, he's moved nearby and thinks that we can have a relationship again. I've given him every possible sign to let him know that could never happen again.
My ex is verbally abusive as well as frightening at times. Please give me some answers to get him out of my life and on with his. An order of protection is not needed, just a wake-up call to reality.
He's also trying to monopolize all of my time.

- It's Over

Stop making it easy for him to bother you - a restraining order IS needed, given his sometimes-frightening behaviour and his determination to push himself back into your life.
You already learned from experience that there's no magic potion to change him; and now he's too close for comfort again.
The most effective "wake-up call" is a warning from police that if he continues to pester and worry you, he'll be dealing with them and the courts.

I've been living for six months with a man and his 19- year old daughter.
He does everything for this girl. She has no responsibilities around the house, there are no consequences to her actions and she's accountable for nothing.
She lies, and even though he knows she's lying, he doesn't challenge her.
She's been catered to for her entire life and is extremely spoiled.
She talks to her father condescendingly.
She refuses to tell him where she's going or with whom.
Most of my friends have children but I've never met another like this one.
He agrees with me in principle on most things we discuss regarding her, but he cannot put anything into practice. If I try to do so, he takes her side.
I have no idea how to change the dynamics in this family. I've suggested counselling but he's not open to it.

- Should I Run?

Yes, run, and make it clear why you're leaving: Those two leave no room for Daddy Indulgent to have a healthy relationship.
This man may seem like a potential long term partner, but it's not going to happen until his daughter is well on her own. And even then, she'll have a strong influence on him and compete with you for his attention.
Counselling for him and for your "family scene" would help; but he's too afraid to rile her or hear uncomfortable truths about needing to change their relationship.
Without a process of professional therapy, this "dynamic" will always leave you an outsider between them.