In most legal systems, an ex-wife generally does not have any legal rights or control over her former husband's current marriage. Once a marriage is legally dissolved through divorce, the legal ties between the ex-spouses are usually severed, and they are no longer bound by marital rights and responsibilities.
In the context of a current marriage, the rights and obligations are established between the individuals who are currently married, not their previous spouses. The ex-wife typically has no legal authority or influence over her former husband's decisions, including his choice of a new spouse or any matters related to his current marriage.
However, there might be some exceptional cases where certain issues from the past marriage can have indirect impacts on the current marriage, particularly if there are shared children involved. Child custody arrangements or financial support obligations from the previous marriage may have implications for the individual's current family life.
It's important to note that laws and regulations can vary depending on the country and jurisdiction, so it's always a good idea to consult with a legal professional to get specific advice tailored to the situation at hand.