I don't think it matters. While he's still doing these risky behaviors, he needs no place in your life.

Focus on you -- not your H, what he's doing, or why. Make your life what you want.

ME: 38
BF: 40
T: 10y, no kids, no M (by choice)
BD: 7/14/14, BF admits to PA, wants out, lies about new R.
10/1/14: I move out, BF lies about move in with OW
12/4/14: OW confronted, reveals all the lies