Is eating from the food of brothers or a husband without their knowledge, or taking what remains of household expenses without informing the husband, considered illicit gain (haram)? And what are the boundaries of such actions with the husband and family?

A woman is permitted to eat from the food of her husband, her son, and her father without their permission. She is also permitted to take a small amount of money without their permission. Furthermore, she is permitted to take from his wealth what exceeds her expenses if she has explicit or customary permission from him.