"How does this help? If you know going in that she is there to derive a benefit, then make sure you are willing and able to provide that benefit, that you are willing and able to continue to provide that benefit, and that the cost to you of providing that benefit is worth the benefit you derive from the association. Be fully aware that when the benefit to her stops, the relationship will stop. Have no illusions. This is true in the UK, France, America, Thailand, and everywhere else. So, if you spend every dime in your retirement fund to build her and/or her mother a house (in her name of course), do not expect that the association will continue. You must say no early and often so you preserve your ability to provide a continuing benefit. If you drain all your resources, then you get what you should expect (see corollary 1)."