Are the husband's family entitled to take the children without the mother's knowledge and consent, and is the mother considered wrong if she sometimes refuses that?

There is no doubt that you have the right to protect your children, monitor them, and know their movements. You are the primary person responsible for their upbringing and guidance, and your in-laws do not have the right to take them without your knowledge. However, you are not permitted to prevent your children from maintaining ties with their paternal relatives. Be tolerant with your in-laws, and inform your husband of this in a friendly manner so that he understands your concern about your children being away from you and strives for them to remain with you.