It may bring some inconvenience and trouble if you forget to cook when you are newly married. The following are some possible bad influences:

1. Embarrassment and impoliteness: In the traditional concept of China, going back to one's mother's family means showing respect and affection for her family. Forgetting to cook may be regarded as disrespectful and inconsiderate behavior, which may make the family of the bride's family feel troubled and embarrassed.

2. Disruption of catering arrangements: Forgetting to cook may cause confusion of catering arrangements, such as the need to prepare other dishes or take-away food urgently. This will not only bring extra expenses, but also cause unnecessary trouble to the family.

3. Affect family harmony: If family members are angry or dissatisfied with forgetting to cook, it may affect family harmony. It should have been a happy and warm time to return home after the wedding, and such negligence may destroy the family atmosphere.

4. Traditional cognition and expectation: In some traditional marriage concepts, the newly married daughter-in-law needs to perform some traditional roles and responsibilities, such as cooking and other housework. Forgetting to cook may go against some people's traditional cognition and expectation.

In a word, forgetting to cook may bring some bad effects to the newly married family, but the specific reaction depends on the concept and situation of individuals and families.