So where was the money "spent"? If it was all wasted on drunken parties and bar-flying, well not much one can do to get it back.
Bought a material object? It's marital property and will be addressed in the settlement.
Hidden in another bank account? Still marital $ needing to be addressed in settlement; if can be found. However, if a spouse refuses to say where that money is, a judge MAY decide to make her responsible for half to the other spouse.