Here's the script

HUSBAND : Our marriage is hopeless. I want to leave.
YOU : Stay away from that woman you are sleeping with.
HUSBAND : I am not sleeping with her, we are just friends.
YOU : I saw you kissing her.
HUSBAND : It was just a friendly kiss - YOU ARE TOO CONTROLLING
YOU : No I'm not
HUSBAND : Our marriage is hopeless. I want to leave.

See how that cycle repeats?

YOUR CHANCE to break this is to NOT ENGAGE him.

Sample :

HUSBAND : Our marriage is hopeless. I want to leave.
YOU : I am NOT going to interact with you while you are in contact with that woman. Your contact with her is DISRESPECTFUL to me and our children. Do NOT CONTACT me. She is hurting YOU, ME, and YOUR CHILDREN.

YOU WALK OUT... do NOT enterain his response.

IGNORE ANYTHING HE HAS to say. YOU told him here that you don't want to talk and WHY. SO you END the conversation.

You state your mind and END the CONTACT. Your mind is

No Contact as long as he's cheating. He KNOWS he's cheating. You don't need to PROOVE it to him. You both know it. Trying to get him to SAY it will just validate his hopelessness and drive him to the OW again.

NO CONTACT is better than DESTRUCTIVE CONTACT ... remember that.

NO CONTACT is bettr than DESTRUCTIVE CONTACT

Just walk away... tell him to leave you alone while he's in contact with her and walk away.

he will DENY the affair. Just WALK away. You BOTH know he's cheating and your message WILL BE HEARD.

But you aren't doing damage, you are showing him your integrity and demanding respect from him. He will hear all of this trust me.

Prooving the affair is a good step forward, but you need intel for that.... that's coming soon.