Final answer:
Anne Boleyn, Henry VIII's second wife, was the one executed on charges of adultery, though the validity of the charges is disputed.
Step-by-step explanation:
The question asks which of Henry VIII's six wives committed adultery. The most infamous case of adultery accusations was against Anne Boleyn, Henry's second wife, who was executed after being accused of adultery. It is important to note that the validity of these charges has been debated by historians. Jane Seymour, Henry's third wife, gave birth to a son, Edward VI, and was not accused of any such indiscretions; she died shortly after childbirth. Anne Boleyn's failure to provide a male heir was one of the reasons she fell out of favor with Henry, leading to her execution. The charges of adultery against her were likely concocted as a pretext for her execution and to enable Henry to remarry in the hopes of having a son.