Legal Question in Family Law in California

Yes, but in the interest of keeping the hostility in the divorce as low as possible, considering it will be high enough no matter what, I recommend that you tell her rather than having her just find out when her key doesn't work, and then make arrangements for her to come over and collect anything she needs that she did not take already. Also, it would be a good idea to go in for a temporary order for exclusive occupancy of the family home, to make it all official. Lastly, you should know that if the rental value of the home is greater than your mortgage, taxes and insurance payments, you could wind up owing her rent once you get down to property settlements.