JRB is right, there is a time limit of 6 months from the date of probate. After that she will need to seek leave to issue proceedings out of time (assuming her claim is under the Inheritance (Provision for Family and Dependants) Act 1975 and from what you have said, it sounds like it - if you want to clarify this, I'll have another look) and will need a good reason for doing so. If she is an adult and able to work, the chances of her being successful are reasonably low, but there are a lot of factors that would need to be considered. However, there are a lot of claims that can be made against estates and the time limits depend on the type of claim it is. You really should seek legal advice asap.