Is it permissible to attend the wedding of a neighbor and friend, knowing that her father's money is Haram?

It is permissible to attend a wedding if it is free from unlawful acts. If food or drink is served, then it should be examined: if the father's entire wealth is unlawful, then it is not permissible to eat or drink from it. However, if his wealth is mixed, there is no harm in eating and drinking. But if the majority of his wealth is unlawful, then it is better to refrain from benefiting from it.