how do you deal when spouse works with OP?

[Babygirl]

Thanks puppy! do you know how many times I have read various places on here, that YOU are amazing? lol, so I feel totally honored to have your input.
I dont know if I did the right thing or not, but let me tell you what I did today.
I got a call today telling me I was gonna be a grandma. (not my kid, but one of my many "kids" who have adopted me over the years" he said dont beat me, I know you said no being a grandma til you are 45, BUT congrats granny. This boy, sheesh is almost 20 ok so man, Works for my H, plays ball with H and on our coed team. He is part of our family. He does know about the OW and keeps an eye on things, my H is in an all day audit, so he called on his lunch. He asked how I was doing, (health, he shaved his head too when i lost my hair) and how I thought things were going with H, and to remind me, he does keep an eye on things. The issue he has, is that H doesnt know he knows, (sheesh idiot lol) but he wants to confront H and let him know he does, and that the OW is truly wrecking our lives, and to tell him how bad it hurts him to see his family falling apart, so he can only imagine what its doing to our children, and that his child is going to really need H and I to be the grandparents and family, he doesnt have to give the child. He wants to offer H support in staying away from OW and a kick in the butt if he gets to close again. He wants to do this on his own as he feels guilty for not confronting H yet. and of course would leave me out(as he always does) and not let H know I already know his plan. I told him I needed to think about it, which I really needed time to get my butt back in here and see what ya'll would think of this.
I didnt ask, I have no expectations. But this would be the first time except for me and his mom, that he will be confronted. so mr puppy what do I do????