If your H tries to call OW again in your own home ask him to leave.. just tell him to leave the house and he isnt' welcome back here while he's doing that... tell him to leave and to keep away from you and your daughter until he chooses to act like an adult...
Want a good tip? Get a few friends and have one visit with you regularly... for moral support.. and whenever your H is there and you bust him on anything your friend will stand right there and watch coldly...
This has an exposure effect on the situation becuase he's being publically exposed each time you bust him with your friend there.
He may just stay silent
You just tell him :
"She already knows you're cheating and not welcome as part of this family while you are doing that... Please leave and don't come back until you can act like an adult and a parent... I can find someone else to support your daughter who won't cheat on her... Please leave.. NOW"
Say it with cold forceful purpose.. not angry, just fed up...
If you keep someone with you it will help you to stay strong too... I don't reccomend interacting with a manipulative spouse one on one on your own like you're doing.. finda friend and have tehm hang out at yoru place. .. kinda like a buddy system.. have a couple if you can... they can run in shifts...
Your H should make himself scarce under those conditions.
I get the impression a lot of people sympathize with you but no one knows what to DO...
