King Henry Help?

Question

who was the wife that cheated on henry with her Tudor or music teacher and henry had the wrong man executed because the affair was with her cousin or something..

Answer 1

Anne Boleyn

Answer 2

Anne Boleyn was accused of bedding her brother, George Boleyn, Viscount Rochford, and he lost his head for that, as did Anne.

You're most likely thinking of Catherine Howard. In the end she lost her head for adultery as well.

Answer 3

As per lozzarino's answer, Katherine Howard.

Answer 4

Your thinking of Katherine Howard, who was executed with her cousin Thomas Culpeper (and considering her last words were wishing she had married him, I'd say they were lovers!), and Francis Dereham, whom she also supposedly had an affair with.