Hello. If baby die in early age like first week of his birth so we can drink wife's breast milk, because there is no one baby who drink the milk so in this situation husband can drink the wife's milk?

Yes you can.

Under the influence of the hormones prolactin and oxytocin, women produce milk after childbirth to feed the baby. The initial milk produced is referred to as colostrum, which is high in the immunoglobulin IgA, which coats the gastrointestinal tract. This helps to protect the newborn until its own immune system is functioning. Colostrum is a form of milk produced by the mammary glands of mammals during pregnancy. Most species will generate colostrum just prior to giving birth. Colostrum contains antibodies to protect the newborn against disease.

Yes he can.