obviously your sons know what is happening, set a good example on how a man should be.
Edited -- and repeated -- for emphasis. Many people in these situations forget that their children are watching . . . often from the very-formative young-adult, teen and pre-teen years. And what they learn from watching how YOU deal with this adversity will play a very large role in how they interact (especially with the other sex) in their adult lives, and how they handle adversity.
