Can the wife spend on herself from the estate of her deceased husband during the mourning period?
Question

My husband died and left behind a sum of money. Is it permissible for me to spend anything of it during the mourning period and ‘iddah?
Praise be to Allah.Anything that you spend of this money is to be deducted from your share of the inheritance, unless the other heirs agree to overlook that. May Allah help us all to do that which pleases Him. End quote.
Majmoo‘ Fataawa Ibn Baaz (20/244).