Phyllis confronts Jack on Friday's show. If Jack is smart, he will tell her the truth. Why? Because Phyllis had a get out of jail free card if she testified against Jack and she refused. If Jack admits the truth about everything he did, I think Phyllis will be disappointed and maybe disgusted with him but won't turn on him. If he lies to her, all bets are off.
If Jack comes clean to Phyllis about the will and other things he did to Gloria, I think Phyllis will urged Jack to bite the bullet and tell his wife everything. Don't let Sharon read this in the papers or hear it from the police like she did with Jabot.