What is the ruling on a wife neglecting her husband's rights due to her preoccupation with children and work?

The question is closer to a complaint than a request for a fatwa. The concise answer is that Islamic law has established rights for each spouse over the other, and dereliction in these rights is a sin and an injustice. Children also have rights and duties over their parents, and it is not permissible to fall short in fulfilling them.