Does the presence of semen in the wife's vagina three or four days after intercourse, despite no subsequent recurrence of this observation, indicate infidelity?

Protecting Muslims' honor and reputation is an Islamic imperative. The Shariah blocks the path for those who defame, prohibits the spread of indecency, and considers slander a major sin that necessitates the prescribed punishment for slander (hadd al-qadhf). Whoever accuses his wife of indecency must produce four witnesses or engage in li'an (oath of condemnation); otherwise, the prescribed punishment will be applied to him. What the questioner found, such as fluid or similar discharge, might be natural feminine secretions and does not justify accusing his wife. His feelings might also be mixed with obsessive doubts.