Is the sum of money which my son now has at his disposal sufficient to stop paying parental support. It was agreed that his costs would be £900 per month split between my ex wife and I. He has approximately 18 months to go at university. The £42000 is more than enough to cover this. My ex wife has been vindictive and resolute in extracting as much money as possible from me and may well resort to legal process on my son's behalf. However the £450 per month is a significant dent in my finances and I am trying to balance the risk of stopping paying against the costs of defending a legal action. Please can you advise on the balance of risk here.