Your wife's actions right now are just a symptom of the "underlying marriage issues" and THAT is what you need to be focusing on, NOT exactly what she is doing now.
Me: 35 husband:39 Sons 16 and 11 from my first marriage Twins 5 (boy/girl) Daughter 3 Affair bomb 2/27/14 He moved in with ow 3/13/14 OW kicked him out 6/15/14 4/2016 he seeks help for sexual addiction