What did Martin need to repent of?

In this revelation to Martin Harris I can understand the final to not covet his own property but to use it to finance the publication of the book of Mormon but the counsel to not covet his neighbors wife suggests that perhaps Martin had a wandering eye. That’s not something that is worth dwelling on for anyone who is not Martin Harris. More valuable is to consider the counsel to say nothing but repentance. There is a time and place for reaching outlet doctrines but we are now prone to deliver into secondary doctrinal details than to stick to the fundamentals is faith and repentance when needed than we are are too stick to faith and repentance when other doctrine is the order of the day.